From 210c0248c6ccd62067af19f137f7da76dfbb58f6 Mon Sep 17 00:00:00 2001
From: "Maarten A. Breddels" <maartenbreddels@gmail.com>
Date: Thu, 13 Aug 2020 16:32:59 +0200
Subject: [PATCH 01/10] feat: support lighting and shadows for scatter and mesh

---
 ipyvolume/pylab.py            | 313 ++++++++++++++++++++++++++++-
 ipyvolume/test_all.py         |  80 ++++++++
 ipyvolume/widgets.py          |  43 ++--
 js/glsl/mesh-fragment.glsl    | 313 +++++++++++++++++++++++++++--
 js/glsl/mesh-vertex.glsl      | 313 +++++++++++++++++++++++++++--
 js/glsl/scatter-fragment.glsl | 334 ++++++++++++++++++++++++++++---
 js/glsl/scatter-vertex.glsl   | 363 ++++++++++++++++++++++++++++++----
 js/src/figure.ts              |  67 +++++++
 js/src/mesh.ts                | 111 ++++++++---
 js/src/scales.ts              |  15 +-
 js/src/scatter.ts             | 154 ++++++++++-----
 js/src/utils.ts               |  12 ++
 js/webpack.config.js          |   9 +-
 13 files changed, 1906 insertions(+), 221 deletions(-)

diff --git a/ipyvolume/pylab.py b/ipyvolume/pylab.py
index b02ddce4..3350fd14 100644
--- a/ipyvolume/pylab.py
+++ b/ipyvolume/pylab.py
@@ -2,6 +2,7 @@
 
 from __future__ import absolute_import
 from __future__ import division
+import pythreejs
 
 __all__ = [
     'current',
@@ -40,6 +41,11 @@
     'style',
     'plot_plane',
     'selector_default',
+    'light_ambient',
+    'light_directional',
+    'light_spot',
+    'light_point',
+    'light_hemisphere',
 ]
 
 import os
@@ -75,7 +81,7 @@
 import ipyvolume as ipv
 import ipyvolume.embed
 from ipyvolume import utils
-
+import math
 
 _last_figure = None
 
@@ -124,6 +130,7 @@ def _docsubst(f):
 _doc_snippets["z2d"] = "idem for z"
 _doc_snippets["texture"] = "PIL.Image object or ipywebrtc.MediaStream (can be a seqence)"
 
+emissive_intensity_default = 0.2
 
 class current:
     figure = None
@@ -309,7 +316,26 @@ def squarelim():
 
 
 @_docsubst
-def plot_trisurf(x, y, z, triangles=None, lines=None, color=default_color, u=None, v=None, texture=None):
+def plot_trisurf(
+    x,
+    y,
+    z,
+    triangles=None,
+    lines=None,
+    color=default_color,
+    u=None,
+    v=None,
+    texture=None,
+    lighting_model='DEFAULT',
+    opacity=1,
+    emissive_intensity=emissive_intensity_default,
+    specular_color='white',
+    shininess=1,
+    roughness=0,
+    metalness=0,
+    cast_shadow=True,
+    receive_shadow=True,
+    flat_shading=True):
     """Draw a polygon/triangle mesh defined by a coordinate and triangle indices.
 
     The following example plots a rectangle in the z==2 plane, consisting of 2 triangles:
@@ -333,10 +359,20 @@ def plot_trisurf(x, y, z, triangles=None, lines=None, color=default_color, u=Non
     :param z: {z}
     :param triangles: numpy array with indices referring to the vertices, defining the triangles, with shape (M, 3)
     :param lines: numpy array with indices referring to the vertices, defining the lines, with shape (K, 2)
-    :param color: {color}
+    :param color: {color} Color of the material, essentially a solid color unaffected by other lighting. Default is 'red'
     :param u: {u}
     :param v: {v}
     :param texture: {texture}
+    :param lighting_model: The lighting model used to calculate the final color of the mesh. Can be 'DEFAULT', 'LAMBERT', 'PHONG', 'PHYSICAL'. implicit 'DEFAULT'. Will be automatically updated to 'PHYSICAL' if a light is added to figure
+    :param opacity: (Non-Default) 0 - Mesh is fully transparent; 1 - Mesh is fully opaque
+    :param emissive_intensity: (Non-Default) Factor multiplied with color. Takes values between 0 and 1. Default is 0.2
+    :param specular_color: {color} (Phong Only) Color of the specular tint. Default 'white'.
+    :param shininess: (Phong Only) Specular intensity. Default is 1
+    :param roughness: (Physical Only) How rough the material appears. 0.0 means a smooth mirror reflection, 1.0 means fully diffuse. Default is 1
+    :param metalness: (Physical Only) How much the material is like a metal. Non-metallic materials such as wood or stone use 0.0, metallic use 1.0, with nothing (usually) in between
+    :param cast_shadow: (Non-Default) Property of a mesh to cast shadows. Default False. Works only with Directional, Point and Spot lights
+    :param receive_shadow: (Non-Default) Property of a mesh to receive shadows. Default False. Works only with Directional, Point and Spot lights
+    :param flat_shading: (Physical, Phong) A technique for color computing where all polygons reflect as a flat surface. Default True
     :return: :any:`Mesh`
     """
     fig = gcf()
@@ -344,7 +380,35 @@ def plot_trisurf(x, y, z, triangles=None, lines=None, color=default_color, u=Non
         triangles = np.array(triangles).astype(dtype=np.uint32)
     if lines is not None:
         lines = np.array(lines).astype(dtype=np.uint32)
-    mesh = ipv.Mesh(x=x, y=y, z=z, triangles=triangles, lines=lines, color=color, u=u, v=v, texture=texture)
+    kwargs = {}
+    if lighting_model == 'DEFAULT':
+        pass  # ok, we rely on Scatter widget's default
+    elif lighting_model == 'PHYSICAL':
+        material = pythreejs.MeshPhysicalMaterial(
+                    opacity=opacity,
+                    emissiveIntensity=emissive_intensity,
+                    roughness=roughness,
+                    metalness=metalness,
+                    flat_shading=flat_shading,
+                    side=pythreejs.enums.Side.DoubleSide)
+        kwargs['material'] = material
+    else:
+        raise ValueError(f'Unknown lighting_model={lighting_model}')
+    # TODO: PHONG and LAMBERT
+    mesh = ipv.Mesh(
+        x=x,
+        y=y,
+        z=z,
+        triangles=triangles,
+        lines=lines,
+        color=color,
+        u=u, v=v,
+        texture=texture,
+        lighting_model=lighting_model,
+        cast_shadow=cast_shadow,
+        receive_shadow=receive_shadow,
+        **kwargs
+        )
     _grow_limits(np.array(x).reshape(-1), np.array(y).reshape(-1), np.array(z).reshape(-1))
     fig.meshes = fig.meshes + [mesh]
     return mesh
@@ -511,26 +575,50 @@ def scatter(
     marker="diamond",
     selection=None,
     grow_limits=True,
+    lighting_model='DEFAULT',
+    opacity=1,
+    emissive_intensity=emissive_intensity_default,
+    roughness=0,
+    metalness=0,
     **kwargs
 ):
     """Plot many markers/symbols in 3d.
-
+       Due to certain shader limitations, should not use with Spot Lights and Point Lights.
+       Does not support shadow mapping.
     :param x: {x}
     :param y: {y}
     :param z: {z}
-    :param color: {color}
+    :param color: {color} Color of the material, essentially a solid color unaffected by other lighting. Default is 'red'
     :param size: {size}
     :param size_selected: like size, but for selected glyphs
     :param color_selected:  like color, but for selected glyphs
     :param marker: {marker}
     :param selection: numpy array of shape (N,) or (S, N) with indices of x,y,z arrays of the selected markers, which
                       can have a different size and color
+    :param lighting_model: The lighting model used to calculate the final color of the mesh. Can be 'DEFAULT', 'PHYSICAL'. implicit 'DEFAULT'. Will be automatically updated to 'PHYSICAL' if a light is added to figure
+    :param opacity: (Physical Only) 0 - Mesh is fully transparent; 1 - Mesh is fully opaque
+    :param emissive_intensity: (Physical Only) Factor multiplied with color. Takes values between 0 and 1. Default is 0.2
+    :param roughness: (Physical Only) How rough the material appears. 0.0 means a smooth mirror reflection, 1.0 means fully diffuse. Default is 1
+    :param metalness: (Physical Only) How much the material is like a metal. Non-metallic materials such as wood or stone use 0.0, metallic use 1.0, with nothing (usually) in between
     :param kwargs:
     :return: :any:`Scatter`
     """
     fig = gcf()
     if grow_limits:
         _grow_limits(x, y, z)
+    kwargs = kwargs.copy()
+    if lighting_model == 'DEFAULT':
+        pass  # ok, we rely on Scatter widget's default
+    elif lighting_model == 'PHYSICAL':
+        material = pythreejs.MeshPhysicalMaterial(
+                    opacity=opacity,
+                    emissiveIntensity=emissive_intensity,
+                    roughness=roughness,
+                    metalness=metalness)
+        kwargs['material'] = material
+    else:
+        # TODO: PHONG/LAMBERT
+        raise ValueError(f'Unknown lighting_model={lighting_model}')
     s = ipv.Scatter(
         x=x,
         y=y,
@@ -1518,3 +1606,216 @@ def _make_triangles_lines(shape, wrapx=False, wrapy=False):
     lines[3::4, 0], lines[3::4, 1] = t1[1], t2[1]
 
     return triangles, lines
+
+def light_ambient(
+    light_color=default_color_selected,
+    intensity = 1):
+    """Create a new Ambient Light
+        An Ambient Light source represents an omni-directional, fixed-intensity and fixed-color light source that affects all objects in the scene equally (is omni-present).
+        This light cannot be used to cast shadows.
+    :param light_color: {color} Color of the Ambient Light. Default 'white'
+    :param intensity: Factor used to increase or decrease the Ambient Light intensity. Default is 1
+    :return: :any:`pythreejs.AmbientLight`
+    """
+
+    light = pythreejs.AmbientLight(color=light_color, intensity=intensity)
+
+    fig = gcf()
+    fig.lights = fig.lights + [light]
+
+    return light
+
+def light_hemisphere(
+    light_color=default_color_selected,
+    light_color2=default_color,
+    intensity = 1,
+    position=[0, 1, 0]):
+    """Create a new Hemisphere Light
+        A light source positioned directly above the scene, with color fading from the sky color to the ground color.
+        This light cannot be used to cast shadows.
+    :param light_color: {color} Sky color. Default 'white'
+    :param light_color2: {color} Ground color. Default 'red'
+    :param intensity: Factor used to increase or decrease the Hemisphere Light intensity. Default is 1
+    :param position: 3-element array (x y z) which describes the position of the Hemisphere Light. Default [0, 1, 0]
+    :return: :any:`pythreejs.HemisphereLight`
+    """
+
+    light = pythreejs.HemisphereLight(color=light_color, groundColor=light_color2, intensity=intensity, position=position)
+
+    fig = gcf()
+    fig.lights = fig.lights + [light]
+
+    return light
+
+def light_directional(
+    light_color=default_color_selected,
+    intensity = 1,
+    position=[10, 10, 10],
+    target=[0, 0, 0],
+    cast_shadow=True):
+    """Create a new Directional Light
+        A Directional Light source illuminates all objects equally from a given direction.
+        This light can be used to cast shadows.
+    :param light_color: {color} Color of the Directional Light. Default 'white'
+    :param intensity: Factor used to increase or decrease the Directional Light intensity. Default is 1
+    :param position: 3-element array (x y z) which describes the position of the Directional Light. Default [10, 10, 10]
+    :param target: 3-element array (x y z) which describes the target of the Directional Light. Default [0, 0, 0]
+    :param cast_shadow: Property of a Directional Light to cast shadows. Default True
+    :return: :any:`pythreejs.DirectionalLight`
+    """
+    near=0.1
+    far=100
+    shadow_map_size=1024
+    shadow_bias=-0.0008
+    shadow_radius=1
+    shadow_camera_orthographic_size=10
+
+    # Shadow params
+    camera = pythreejs.OrthographicCamera(
+        near=near,
+        far=far,
+        left=-shadow_camera_orthographic_size/2,
+        right=shadow_camera_orthographic_size/2,
+        top=shadow_camera_orthographic_size/2,
+        bottom=-shadow_camera_orthographic_size/2
+    )
+    shadow = pythreejs.DirectionalLightShadow(
+        mapSize=(shadow_map_size, shadow_map_size),
+        radius=shadow_radius,
+        bias=shadow_bias,
+        camera=camera
+    )
+    # Light params
+    target = pythreejs.Object3D(position=target)
+    light = pythreejs.DirectionalLight(
+        color=light_color,
+        intensity=intensity,
+        position=position,
+        target=target,
+        castShadow=cast_shadow,
+        shadow=shadow
+    )
+
+    fig = gcf()
+
+    fig.lights = fig.lights + [light]
+
+    return light
+
+def light_spot(
+    light_color=default_color_selected,
+    intensity = 1,
+    position=[10, 10, 10],
+    target=[0, 0, 0],
+    cast_shadow=True):
+    """Create a new Spot Light
+        A Spot Light produces a directed cone of light. The light becomes more intense closer to the spotlight source and to the center of the light cone.
+        This light can be used to cast shadows.
+    :param light_color: {color} Color of the Spot Light. Default 'white'
+    :param intensity: Factor used to increase or decrease the Spot Light intensity. Default is 1
+    :param position: 3-element array (x y z) which describes the position of the Spot Light. Default [0 1 0]
+    :param target: 3-element array (x y z) which describes the target of the Spot Light. Default [0 0 0]
+    :param cast_shadow: Property of a Spot Light to cast shadows. Default False
+    :return: :any:`pythreejs.SpotLight`
+    """
+
+    angle=0.8
+    penumbra=0
+    distance=0
+    decay=1
+    shadow_map_size=1024
+    shadow_bias=-0.0008
+    shadow_radius=1
+    near=0.5
+    far=5000
+    fov=90
+    aspect=1
+
+    # Shadow params
+    camera = pythreejs.PerspectiveCamera(
+        near=near,
+        far=far,
+        fov=fov,
+        aspect=aspect
+    )
+    shadow = pythreejs.LightShadow(
+        mapSize=(shadow_map_size,shadow_map_size),
+        radius=shadow_radius,
+        bias=shadow_bias,
+        camera=camera
+    )
+    # Light params
+    target = pythreejs.Object3D(position=target)
+    light = pythreejs.SpotLight(
+        color=light_color,
+        intensity=intensity,
+        position=position,
+        target=target,
+        angle=angle,
+        distance=distance,
+        decay=decay,
+        penumbra=penumbra,
+        castShadow=cast_shadow,
+        shadow=shadow
+    )
+
+    fig = gcf()
+
+    fig.lights = fig.lights + [light]
+
+    return light
+
+def light_point(
+    light_color=default_color_selected,
+    intensity = 1,
+    position=[10, 10, 10],
+    cast_shadow=True):
+    """Create a new Point Light
+        A Point Light originates from a single point and spreads outward in all directions.
+        This light can be used to cast shadows.
+    :param light_color: {color} Color of the Point Light. Default 'white'
+    :param intensity: Factor used to increase or decrease the Point Light intensity. Default is 1
+    :param position: 3-element array (x y z) which describes the position of the Point Light. Default [0 1 0]
+    :param cast_shadow: Property of a Point Light to cast shadows. Default False
+    :return: :any:`PointLight`
+    """
+    near=0.5
+    far=5000
+    fov=90
+    aspect=1
+    distance=0
+    decay=1
+    shadow_map_size=1024
+    shadow_bias=-0.0008
+    shadow_radius=1
+
+    # Shadow params
+    camera = pythreejs.PerspectiveCamera(
+        near=near,
+        far=far,
+        fov=fov,
+        aspect=aspect
+    )
+    shadow = pythreejs.LightShadow(
+        mapSize=(shadow_map_size,shadow_map_size),
+        radius=shadow_radius,
+        bias=shadow_bias,
+        camera=camera
+    )
+    # Light params
+    light = pythreejs.PointLight(
+        color=light_color,
+        intensity=intensity,
+        position=position,
+        distance=distance,
+        decay=decay,
+        castShadow=cast_shadow,
+        shadow=shadow
+    )
+
+
+    fig = gcf()
+
+    fig.lights = fig.lights + [light]
+
+    return light
diff --git a/ipyvolume/test_all.py b/ipyvolume/test_all.py
index ccb543b3..2d6a3390 100644
--- a/ipyvolume/test_all.py
+++ b/ipyvolume/test_all.py
@@ -7,6 +7,7 @@
 
 import numpy as np
 import pytest
+import pythreejs
 
 import ipyvolume
 import ipyvolume.pylab as p3
@@ -449,3 +450,82 @@ def test_datasets():
     ipyvolume.datasets.aquariusA2.fetch()
     ipyvolume.datasets.hdz2000.fetch()
     ipyvolume.datasets.zeldovich.fetch()
+
+
+def test_mesh_material():
+    x = [0, 1]
+    scatter = ipv.scatter(x, x, x)
+    assert isinstance(scatter.material, pythreejs.ShaderMaterial)
+    scatter = ipv.scatter(x, x, x, lighting_model='PHYSICAL')
+    assert isinstance(scatter.material, pythreejs.MeshPhysicalMaterial)
+    # TODO: test passed parameters and PHONG/LAMBERT
+    # TODO: test plot_trisurf
+
+
+def test_light_components():
+    ambient = ipyvolume.light_ambient()
+    assert ambient.type == 'AmbientLight'
+    assert ambient.color == 'white'
+    assert ambient.intensity == 1
+
+    hemisphere = ipyvolume.light_hemisphere()
+    assert hemisphere.type == 'HemisphereLight'
+    assert hemisphere.color == 'white'
+    assert hemisphere.groundColor == 'red'
+    assert hemisphere.intensity == 1
+    assert hemisphere.position[0] == 0
+    assert hemisphere.position[1] == 1
+    assert hemisphere.position[2] == 0
+
+    directional = ipyvolume.light_directional()
+    assert directional.color == 'white'
+    assert directional.intensity == 1
+    assert directional.position[0] == 10
+    assert directional.position[1] == 10
+    assert directional.position[2] == 10
+    assert directional.target.position[0] == 0
+    assert directional.target.position[1] == 0
+    assert directional.target.position[2] == 0
+    assert directional.castShadow==True
+    assert directional.shadow.bias==-0.0008
+    assert directional.shadow.radius==1
+    assert directional.shadow.camera.near==0.1
+    assert directional.shadow.camera.far==100
+    assert directional.shadow.mapSize[0]==1024
+    assert directional.shadow.camera.left==-10/2
+    assert directional.shadow.camera.right==10/2
+    assert directional.shadow.camera.top==10/2
+    assert directional.shadow.camera.bottom==-10/2
+
+    spot = ipyvolume.light_spot()
+    assert spot.color == 'white'
+    assert spot.intensity == 1
+    assert spot.position[0] == 10
+    assert spot.position[1] == 10
+    assert spot.position[2] == 10
+    assert spot.target.position[0] == 0
+    assert spot.target.position[1] == 0
+    assert spot.target.position[2] == 0
+    assert spot.shadow.camera.fov==90
+    assert spot.castShadow==True
+    assert spot.shadow.mapSize[0]==1024
+    assert spot.shadow.bias==-0.0008
+    assert spot.shadow.radius==1
+    assert spot.shadow.camera.near==0.5
+    assert spot.shadow.camera.far==5000
+
+    point = ipyvolume.light_point()
+    assert point.color == 'white'
+    assert point.intensity == 1
+    assert point.position[0] == 10
+    assert point.position[1] == 10
+    assert point.position[2] == 10
+    assert point.shadow.camera.fov==90
+    assert point.castShadow==True
+    assert point.distance==0
+    assert point.decay==1
+    assert point.shadow.mapSize[0]==1024
+    assert point.shadow.bias==-0.0008
+    assert point.shadow.radius==1
+    assert point.shadow.camera.near==0.5
+    assert point.shadow.camera.far==5000
\ No newline at end of file
diff --git a/ipyvolume/widgets.py b/ipyvolume/widgets.py
index a81801f9..85ad4fb7 100644
--- a/ipyvolume/widgets.py
+++ b/ipyvolume/widgets.py
@@ -78,23 +78,28 @@ class Mesh(widgets.Widget):
     color = Array(default_value="red", allow_none=True).tag(sync=True, **color_serialization)
     visible = traitlets.CBool(default_value=True).tag(sync=True)
 
-    material = traitlets.Instance(
-        pythreejs.ShaderMaterial, help='A :any:`pythreejs.ShaderMaterial` that is used for the mesh'
-    ).tag(sync=True, **widgets.widget_serialization)
+    material =  traitlets.Union([
+            traitlets.Instance(pythreejs.ShaderMaterial),
+            traitlets.Instance(pythreejs.MeshPhysicalMaterial),
+            traitlets.Instance(pythreejs.MeshPhongMaterial),
+            traitlets.Instance(pythreejs.MeshLambertMaterial),
+        ], help='A :any:`pythreejs.Material` that is used for the mesh').tag(sync=True, **widgets.widget_serialization)
 
     @traitlets.default('material')
     def _default_material(self):
         return pythreejs.ShaderMaterial(side=pythreejs.enums.Side.DoubleSide)
 
-    line_material = traitlets.Instance(
-        pythreejs.ShaderMaterial, help='A :any:`pythreejs.ShaderMaterial` that is used for the lines/wireframe'
-    ).tag(sync=True, **widgets.widget_serialization)
+    line_material =  traitlets.Union([
+            traitlets.Instance(pythreejs.ShaderMaterial),
+            traitlets.Instance(pythreejs.MeshPhysicalMaterial),
+            traitlets.Instance(pythreejs.MeshPhongMaterial),
+            traitlets.Instance(pythreejs.MeshLambertMaterial),
+        ], help='A :any:`pythreejs.Material` that is used for the lines/wireframe').tag(sync=True, **widgets.widget_serialization)
 
     @traitlets.default('line_material')
     def _default_line_material(self):
         return pythreejs.ShaderMaterial()
 
-
 @widgets.register
 class Scatter(widgets.Widget):
     _view_name = Unicode('ScatterView').tag(sync=True)
@@ -147,6 +152,9 @@ class Scatter(widgets.Widget):
     visible = traitlets.CBool(default_value=True).tag(sync=True)
     shader_snippets = traitlets.Dict({'size': '\n'}).tag(sync=True)
 
+    cast_shadow = traitlets.CBool(default_value=True).tag(sync=True)
+    receive_shadow = traitlets.CBool(default_value=True).tag(sync=True)
+
     texture = traitlets.Union(
         [
             traitlets.Instance(ipywebrtc.MediaStream),
@@ -157,17 +165,23 @@ class Scatter(widgets.Widget):
         ]
     ).tag(sync=True, **texture_serialization)
 
-    material = traitlets.Instance(
-        pythreejs.ShaderMaterial, help='A :any:`pythreejs.ShaderMaterial` that is used for the mesh'
-    ).tag(sync=True, **widgets.widget_serialization)
+    material =  traitlets.Union([
+            traitlets.Instance(pythreejs.ShaderMaterial),
+            traitlets.Instance(pythreejs.MeshPhysicalMaterial),
+            traitlets.Instance(pythreejs.MeshPhongMaterial),
+            traitlets.Instance(pythreejs.MeshLambertMaterial),
+        ], help='A :any:`pythreejs.Material` that is used for the mesh').tag(sync=True, **widgets.widget_serialization)
 
     @traitlets.default('material')
     def _default_material(self):
         return pythreejs.ShaderMaterial()
 
-    line_material = traitlets.Instance(
-        pythreejs.ShaderMaterial, help='A :any:`pythreejs.ShaderMaterial` that is used for the lines/wireframe'
-    ).tag(sync=True, **widgets.widget_serialization)
+    line_material =  traitlets.Union([
+            traitlets.Instance(pythreejs.ShaderMaterial),
+            traitlets.Instance(pythreejs.MeshPhysicalMaterial),
+            traitlets.Instance(pythreejs.MeshPhongMaterial),
+            traitlets.Instance(pythreejs.MeshLambertMaterial),
+        ], help='A :any:`pythreejs.Material` that is used for the lines/wireframe').tag(sync=True, **widgets.widget_serialization)
 
     @traitlets.default('line_material')
     def _default_line_material(self):
@@ -267,6 +281,9 @@ class Figure(ipywebrtc.MediaStream):
     volumes = traitlets.List(traitlets.Instance(Volume), [], allow_none=False).tag(
         sync=True, **widgets.widget_serialization
     )
+    lights = traitlets.List(traitlets.Instance(pythreejs.Light), [], allow_none=False).tag(
+        sync=True, **widgets.widget_serialization
+    )
 
     animation = traitlets.Float(1000.0).tag(sync=True)
     animation_exponent = traitlets.Float(1.0).tag(sync=True)
diff --git a/js/glsl/mesh-fragment.glsl b/js/glsl/mesh-fragment.glsl
index 55a663de..38d429c5 100644
--- a/js/glsl/mesh-fragment.glsl
+++ b/js/glsl/mesh-fragment.glsl
@@ -1,3 +1,148 @@
+// mesh-fragment shader
+#if defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+    // taken similar to phong shading
+    #include <common>
+    #include <packing>
+    #include <dithering_pars_fragment>
+    #include <color_pars_fragment>
+    #include <uv_pars_fragment>
+    #include <uv2_pars_fragment>
+    #include <map_pars_fragment>
+    #include <alphamap_pars_fragment>
+    #include <aomap_pars_fragment>
+    #include <lightmap_pars_fragment>
+    #include <emissivemap_pars_fragment>
+    #include <envmap_pars_fragment>
+    #include <gradientmap_pars_fragment>
+    #include <fog_pars_fragment>
+    #include <bsdfs>
+    #include <lights_pars_begin>
+    // #include <lights_phong_pars_fragment>
+    #include <shadowmap_pars_fragment>
+    #include <shadowmask_pars_fragment> // extra compared to phong
+
+    #include <bumpmap_pars_fragment>
+    #include <normalmap_pars_fragment>
+    #include <specularmap_pars_fragment>
+    #include <logdepthbuf_pars_fragment>
+    #include <clipping_planes_pars_fragment>
+#endif //defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+#ifdef AS_LAMBERT
+    #define LAMBERT
+    uniform vec3 diffuse;
+    uniform vec3 emissive;
+    uniform float emissiveIntensity;
+    uniform float opacity;
+
+    varying vec3 vLightFront;
+
+    #ifdef DOUBLE_SIDED
+        varying vec3 vLightBack;
+    #endif
+
+    #include <common>
+    #include <packing>
+    #include <dithering_pars_fragment>
+    #include <color_pars_fragment>
+    #include <uv_pars_fragment>
+    #include <uv2_pars_fragment>
+    #include <map_pars_fragment>
+    #include <alphamap_pars_fragment>
+    #include <aomap_pars_fragment>
+    #include <lightmap_pars_fragment>
+    #include <emissivemap_pars_fragment>
+    #include <envmap_pars_fragment>
+    #include <bsdfs>
+    #include <lights_pars_begin>
+    #include <fog_pars_fragment>
+    #include <shadowmap_pars_fragment>
+    #include <shadowmask_pars_fragment>
+    #include <specularmap_pars_fragment>
+    #include <logdepthbuf_pars_fragment>
+    #include <clipping_planes_pars_fragment>
+#endif //AS_LAMBERT
+#ifdef AS_PHONG
+    #define PHONG
+
+    uniform vec3 diffuse;
+    uniform vec3 emissive;
+    uniform vec3 specular;
+
+    uniform float shininess;
+    uniform float opacity;
+    uniform float emissiveIntensity;
+
+    #include <common>
+    #include <packing>
+    #include <dithering_pars_fragment>
+    #include <color_pars_fragment>
+    #include <uv_pars_fragment>
+    #include <uv2_pars_fragment>
+    #include <map_pars_fragment>
+    #include <alphamap_pars_fragment>
+    #include <aomap_pars_fragment>
+    #include <lightmap_pars_fragment>
+    #include <emissivemap_pars_fragment>
+    #include <envmap_pars_fragment>
+    #include <gradientmap_pars_fragment>
+    #include <fog_pars_fragment>
+    #include <bsdfs>
+    #include <lights_pars_begin>
+    #include <lights_phong_pars_fragment>
+    #include <shadowmap_pars_fragment>
+    #include <bumpmap_pars_fragment>
+    #include <normalmap_pars_fragment>
+    #include <specularmap_pars_fragment>
+    #include <logdepthbuf_pars_fragment>
+    #include <clipping_planes_pars_fragment>
+#endif //AS_PHONG
+#ifdef AS_PHYSICAL
+    #define PHYSICAL
+    uniform vec3 diffuse;
+    uniform vec3 emissive;
+    uniform float roughness;
+    uniform float metalness;
+    uniform float opacity;
+    uniform float emissiveIntensity;
+
+    #ifndef STANDARD
+        uniform float clearCoat;
+        uniform float clearCoatRoughness;
+    #endif
+
+    varying vec3 vViewPosition;
+
+    #ifndef FLAT_SHADED
+        varying vec3 vNormal;
+    #endif
+
+    #include <common>
+    #include <packing>
+    #include <dithering_pars_fragment>
+    #include <color_pars_fragment>
+    #include <uv_pars_fragment>
+    #include <uv2_pars_fragment>
+    #include <map_pars_fragment>
+    #include <alphamap_pars_fragment>
+    #include <aomap_pars_fragment>
+    #include <lightmap_pars_fragment>
+    #include <emissivemap_pars_fragment>
+    #include <bsdfs>
+    #include <cube_uv_reflection_fragment>
+    #include <envmap_pars_fragment>
+    #include <envmap_physical_pars_fragment>
+    #include <fog_pars_fragment>
+    #include <lights_pars_begin>
+    #include <lights_physical_pars_fragment>
+    #include <shadowmap_pars_fragment>
+    #include <bumpmap_pars_fragment>
+    #include <normalmap_pars_fragment>
+    #include <roughnessmap_pars_fragment>
+    #include <metalnessmap_pars_fragment>
+    #include <logdepthbuf_pars_fragment>
+    #include <clipping_planes_pars_fragment>
+#endif //AS_PHYSICAL
+
 varying vec4 vertex_color;
 varying vec3 vertex_position;
 varying vec2 vertex_uv;
@@ -9,24 +154,154 @@ varying vec2 vertex_uv;
 #endif
 
 
-void main(void) {
-#ifdef USE_RGB
-    gl_FragColor = vec4(vertex_color.rgb, 1.0);
-#else
-#ifdef AS_LINE
-    gl_FragColor = vec4(vertex_color.rgb, vertex_color.a);
-#else
-    vec3 fdx = dFdx( vertex_position );
-    vec3 fdy = dFdy( vertex_position );
-    vec3 normal = normalize( cross( fdx, fdy ) );
-    float diffuse = dot( normal, vec3( 0.0, 0.0, 1.0 ) );
+void main(void)
+{
+#if defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+    #ifdef AS_COORDINATE
+        // should we ignore shading for RGB pass?
+        gl_FragColor = vec4(vertex_color.rgb, 1.0);
+    #else
+        // 0 when in shadow, 1 if visible
+        float shadow_visibility = getShadowMask();
+        #ifdef IS_LINE
+            gl_FragColor = vec4(vertex_color.rgb * shadow_visibility, vertex_color.a);
+        #else
+            vec3 fdx = dFdx( vertex_position );
+            vec3 fdy = dFdy( vertex_position );
+            vec3 normal = normalize( cross( fdx, fdy ) );
+            float diffuse = dot( normal, vec3( 0.0, 0.0, 1.0 ) );
 
-#ifdef USE_TEXTURE
-    vec4 sample = mix(texture2D(texture_previous, vertex_uv), texture2D(texture, vertex_uv), animation_time_texture);
-    gl_FragColor = vec4(clamp(diffuse, 0.2, 1.) * sample.rgb, 1.0);
-#else
-    gl_FragColor = vec4(clamp(diffuse, 0.2, 1.) * vertex_color.rgb, vertex_color.a);
-#endif // USE_TEXTURE
-#endif // AS_LINE
-#endif // USE_RGB
+            #ifdef USE_TEXTURE
+                vec4 sample = mix(texture2D(texture_previous, vertex_uv), texture2D(texture, vertex_uv), animation_time_texture);
+                gl_FragColor = vec4(clamp(diffuse, 0.2, 1.) * sample.rgb * shadow_visibility, 1.0);
+            #else
+                gl_FragColor = vec4(clamp(diffuse, 0.2, 1.) * vertex_color.rgb * shadow_visibility, vertex_color.a);
+            #endif // USE_TEXTURE
+        #endif // IS_LINE
+    #endif // AS_COORDINATE
+#endif //defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+
+#ifdef AS_LAMBERT
+    #include <clipping_planes_fragment>
+
+	vec4 diffuseColor = vec4( vec3(1,1,1), opacity );
+	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );
+	vec3 totalEmissiveRadiance = emissive * emissiveIntensity;
+
+	#include <logdepthbuf_fragment>
+	#include <map_fragment>
+	//#include <color_fragment>
+	#include <alphamap_fragment>
+	#include <alphatest_fragment>
+	#include <specularmap_fragment>
+	#include <emissivemap_fragment>
+
+	// accumulation
+	reflectedLight.indirectDiffuse = getAmbientLightIrradiance( ambientLightColor );
+
+	#include <lightmap_fragment>
+
+	reflectedLight.indirectDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb );
+
+	#ifdef DOUBLE_SIDED
+		reflectedLight.directDiffuse = ( gl_FrontFacing ) ? vLightFront : vLightBack;
+	#else
+		reflectedLight.directDiffuse = vLightFront;
+	#endif
+
+	reflectedLight.directDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb ) * getShadowMask();
+
+	// modulation
+	#include <aomap_fragment>
+
+	vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;
+
+	#include <envmap_fragment>
+
+	gl_FragColor = vec4( outgoingLight, diffuseColor.a );
+
+	#include <tonemapping_fragment>
+	#include <encodings_fragment>
+	#include <fog_fragment>
+	#include <premultiplied_alpha_fragment>
+	#include <dithering_fragment>
+
+#endif //AS_LAMBERT
+
+#ifdef AS_PHONG
+    #include <clipping_planes_fragment>
+
+	vec4 diffuseColor = vec4( vec3(1,1,1), opacity );
+	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );
+	vec3 totalEmissiveRadiance = emissive * emissiveIntensity;
+
+	#include <logdepthbuf_fragment>
+	#include <map_fragment>
+	//#include <color_fragment>
+	#include <alphamap_fragment>
+	#include <alphatest_fragment>
+	#include <specularmap_fragment>
+	#include <normal_fragment_begin>
+	#include <normal_fragment_maps>
+	//normal = -normal;
+	#include <emissivemap_fragment>
+
+	// accumulation
+	#include <lights_phong_fragment>
+	#include <lights_fragment_begin>
+	#include <lights_fragment_maps>
+	#include <lights_fragment_end>
+
+	// modulation
+	#include <aomap_fragment>
+
+	vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;
+
+	#include <envmap_fragment>
+
+	gl_FragColor = vec4( outgoingLight, diffuseColor.a );
+
+	#include <tonemapping_fragment>
+	#include <encodings_fragment>
+	#include <fog_fragment>
+	#include <premultiplied_alpha_fragment>
+	#include <dithering_fragment>
+#endif //AS_PHONG
+
+#ifdef AS_PHYSICAL
+	#include <clipping_planes_fragment>
+
+	vec4 diffuseColor = vec4( vec3(1,1,1), opacity );
+	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );
+	vec3 totalEmissiveRadiance = emissive * emissiveIntensity;
+
+	#include <logdepthbuf_fragment>
+	#include <map_fragment>
+	//#include <color_fragment>
+	#include <alphamap_fragment>
+	#include <alphatest_fragment>
+	#include <roughnessmap_fragment>
+	#include <metalnessmap_fragment>
+	#include <normal_fragment_begin>
+	#include <normal_fragment_maps>
+	#include <emissivemap_fragment>
+
+	// accumulation
+	#include <lights_physical_fragment>
+	#include <lights_fragment_begin>
+	#include <lights_fragment_maps>
+	#include <lights_fragment_end>
+
+	// modulation
+	#include <aomap_fragment>
+
+	vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;
+	gl_FragColor = vec4( outgoingLight, diffuseColor.a );
+
+	#include <tonemapping_fragment>
+	#include <encodings_fragment>
+	#include <fog_fragment>
+	#include <premultiplied_alpha_fragment>
+	#include <dithering_fragment>
+#endif //AS_PHYSICAL
 }
diff --git a/js/glsl/mesh-vertex.glsl b/js/glsl/mesh-vertex.glsl
index cd14ec7d..df01bfda 100644
--- a/js/glsl/mesh-vertex.glsl
+++ b/js/glsl/mesh-vertex.glsl
@@ -1,3 +1,4 @@
+// mesh-vertex shader
 #define USE_SCALE_X
 #define USE_SCALE_Y
 #define USE_SCALE_Z
@@ -30,39 +31,321 @@ attribute vec3 position_previous;
 #endif
 
 #ifdef USE_COLORMAP
-attribute float color;
-attribute float color_previous;
-uniform vec2 domain_color;
+    attribute float color_current;
+    attribute float color_previous;
+    uniform vec2 domain_color;
 #else
-attribute vec4 color;
-attribute vec4 color_previous;
+    attribute vec4 color_current;
+    attribute vec4 color_previous;
 #endif
 uniform sampler2D colormap;
 
+#if defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+    // similar to phong
+    #include <common>
+    #include <uv_pars_vertex>
+    #include <uv2_pars_vertex>
+    #include <envmap_pars_vertex>
+    #include <bsdfs>
+    #include <lights_pars_begin>
+    #include <color_pars_vertex>
+    #include <fog_pars_vertex>
+    #include <morphtarget_pars_vertex>
+    #include <skinning_pars_vertex>
+    #include <shadowmap_pars_vertex>
+    #include <logdepthbuf_pars_vertex>
+    #include <clipping_planes_pars_vertex>
+#endif //defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+
+#ifdef AS_LAMBERT
+    #define LAMBERT
+    varying vec3 vLightFront;
+
+    #ifdef DOUBLE_SIDED
+        varying vec3 vLightBack;
+    #endif
+
+    #include <common>
+    #include <uv_pars_vertex>
+    #include <uv2_pars_vertex>
+    #include <envmap_pars_vertex>
+    #include <bsdfs>
+    #include <lights_pars_begin>
+    #include <color_pars_vertex>
+    #include <fog_pars_vertex>
+    #include <morphtarget_pars_vertex>
+    #include <skinning_pars_vertex>
+    #include <shadowmap_pars_vertex>
+    #include <logdepthbuf_pars_vertex>
+    #include <clipping_planes_pars_vertex>
+#endif //AS_LAMBERT
+
+#ifdef AS_PHONG
+    #define PHONG
+    varying vec3 vViewPosition;
+
+    #ifndef FLAT_SHADED
+        varying vec3 vNormal;
+    #endif
+
+    #include <common>
+    #include <uv_pars_vertex>
+    #include <uv2_pars_vertex>
+    #include <displacementmap_pars_vertex>
+    #include <envmap_pars_vertex>
+    #include <color_pars_vertex>
+    #include <fog_pars_vertex>
+    #include <morphtarget_pars_vertex>
+    #include <skinning_pars_vertex>
+    #include <shadowmap_pars_vertex>
+    #include <logdepthbuf_pars_vertex>
+    #include <clipping_planes_pars_vertex>
+#endif //AS_PHONG
+
+#ifdef AS_PHYSICAL
+    #define PHYSICAL
+    varying vec3 vViewPosition;
+
+    #ifndef FLAT_SHADED
+        varying vec3 vNormal;
+    #endif
+
+    #include <common>
+    #include <uv_pars_vertex>
+    #include <uv2_pars_vertex>
+    #include <displacementmap_pars_vertex>
+    #include <color_pars_vertex>
+    #include <fog_pars_vertex>
+    #include <morphtarget_pars_vertex>
+    #include <skinning_pars_vertex>
+    #include <shadowmap_pars_vertex>
+    #include <logdepthbuf_pars_vertex>
+    #include <clipping_planes_pars_vertex>
+#endif //AS_PHYSICAL
+#ifdef AS_DEPTH
+    #include <common>
+    #include <uv_pars_vertex>
+    #include <displacementmap_pars_vertex>
+    #include <morphtarget_pars_vertex>
+    #include <skinning_pars_vertex>
+    #include <logdepthbuf_pars_vertex>
+    #include <clipping_planes_pars_vertex>
+#endif //AS_DEPTH
+#ifdef AS_DISTANCE
+    #define DISTANCE
+
+    varying vec3 vWorldPosition;
+
+    #include <common>
+    #include <uv_pars_vertex>
+    #include <displacementmap_pars_vertex>
+    #include <morphtarget_pars_vertex>
+    #include <skinning_pars_vertex>
+    #include <clipping_planes_pars_vertex>
+#endif //AS_DISTANCE
 
 void main(void) {
+#if defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+    #include <uv_vertex>
+	#include <uv2_vertex>
+	#include <color_vertex>
+
+	#include <beginnormal_vertex>
+	#include <morphnormal_vertex>
+	#include <skinbase_vertex>
+	#include <skinnormal_vertex>
+	#include <defaultnormal_vertex>
+
+	#include <begin_vertex>
+#endif //defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+#ifdef AS_LAMBERT
+    #include <uv_vertex>
+	#include <uv2_vertex>
+	#include <color_vertex>
+
+	#include <beginnormal_vertex>
+	#include <morphnormal_vertex>
+	#include <skinbase_vertex>
+	#include <skinnormal_vertex>
+	#include <defaultnormal_vertex>
+
+	#include <begin_vertex>
+#endif //AS_LAMBERT
+#ifdef AS_PHONG
+	#include <uv_vertex>
+	#include <uv2_vertex>
+	#include <color_vertex>
+
+	#include <beginnormal_vertex>
+	#include <morphnormal_vertex>
+	#include <skinbase_vertex>
+	#include <skinnormal_vertex>
+	#include <defaultnormal_vertex>
+
+    #ifndef FLAT_SHADED // Normal computed with derivatives when FLAT_SHADED
+	    vNormal = normalize( transformedNormal );
+    #endif
+
+	#include <begin_vertex>
+#endif //AS_PHONG
+#ifdef AS_PHYSICAL
+	#include <uv_vertex>
+	#include <uv2_vertex>
+	#include <color_vertex>
+
+	#include <beginnormal_vertex>
+	#include <morphnormal_vertex>
+	#include <skinbase_vertex>
+	#include <skinnormal_vertex>
+	#include <defaultnormal_vertex>
+
+    #ifndef FLAT_SHADED // Normal computed with derivatives when FLAT_SHADED
+	    vNormal = normalize( transformedNormal );
+    #endif
+
+	#include <begin_vertex>
+#endif //AS_PHYSICAL
+#ifdef AS_DEPTH
+	#include <uv_vertex>
+
+	#include <skinbase_vertex>
+
+	#ifdef USE_DISPLACEMENTMAP
+
+		#include <beginnormal_vertex>
+		#include <morphnormal_vertex>
+		#include <skinnormal_vertex>
+
+	#endif
+
+	#include <begin_vertex>
+#endif //AS_DEPTH
+#ifdef AS_DISTANCE
+	#include <uv_vertex>
+
+	#include <skinbase_vertex>
+
+	#ifdef USE_DISPLACEMENTMAP
+
+		#include <beginnormal_vertex>
+		#include <morphnormal_vertex>
+		#include <skinnormal_vertex>
+
+	#endif
+
+	#include <begin_vertex>
+#endif //AS_DISTANCE
+
     vec3 animation_time = vec3(animation_time_x, animation_time_y, animation_time_z);
     vec3 animated_position = mix(position_previous, position, animation_time);
 
-    vec3 model_pos = vec3(SCALE_X(animated_position.x), SCALE_Y(animated_position.y), SCALE_Z(animated_position.z));
-    gl_Position = projectionMatrix *
-                modelViewMatrix *
-                vec4(model_pos, 1.0);
-    vec3 positionEye = ( modelViewMatrix * vec4(model_pos, 1.0 ) ).xyz;
-    vertex_position = positionEye;
+    transformed = vec3(SCALE_X(animated_position.x), SCALE_Y(animated_position.y), SCALE_Z(animated_position.z));
+    // gl_Position = projectionMatrix *
+    //             modelViewMatrix *
+    //             vec4(model_pos, 1.0);
+    // vec3 positionEye = ( modelViewMatrix * vec4(model_pos, 1.0 ) ).xyz;
+    // vertex_position = positionEye;
+
+
+#if defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+    // vec3 model_pos = vec3(SCALE_X(animated_position.x), SCALE_Y(animated_position.y), SCALE_Z(animated_position.z));
+    // gl_Position = projectionMatrix *
+    //             modelViewMatrix *
+    //             vec4(model_pos, 1.0);
+    // vec3 positionEye = ( modelViewMatrix * vec4(model_pos, 1.0 ) ).xyz;
+    // vertex_position = positionEye;
+#endif //defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+
 #ifdef USE_TEXTURE
     vertex_uv = vec2(mix(u_previous, u, animation_time_u), mix(v_previous, v, animation_time_v));
 #endif
 
-#ifdef USE_RGB
-    vertex_color = vec4(model_pos + vec3(0.5, 0.5, 0.5), 1.0);
+
+#if defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+	#include <morphtarget_vertex>
+	#include <skinning_vertex>
+	#include <project_vertex>
+	#include <logdepthbuf_vertex>
+	#include <clipping_planes_vertex>
+
+	#include <worldpos_vertex>
+	#include <envmap_vertex>
+    vec3 positionEye = ( modelViewMatrix * vec4(transformed, 1.0 ) ).xyz;
+    vertex_position = positionEye;
+	// #include <lights_lambert_vertex>
+	#include <shadowmap_vertex>
+	#include <fog_vertex>
+#endif //defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+#ifdef AS_LAMBERT
+	#include <morphtarget_vertex>
+	#include <skinning_vertex>
+	#include <project_vertex>
+	#include <logdepthbuf_vertex>
+	#include <clipping_planes_vertex>
+
+	#include <worldpos_vertex>
+	#include <envmap_vertex>
+	#include <lights_lambert_vertex>
+	#include <shadowmap_vertex>
+	#include <fog_vertex>
+#endif //AS_LAMBERT
+#ifdef AS_PHONG
+	#include <morphtarget_vertex>
+	#include <skinning_vertex>
+	#include <displacementmap_vertex>
+	#include <project_vertex>
+	#include <logdepthbuf_vertex>
+	#include <clipping_planes_vertex>
+
+	vViewPosition = - mvPosition.xyz;
+
+	#include <worldpos_vertex>
+	#include <envmap_vertex>
+	#include <shadowmap_vertex>
+	#include <fog_vertex>
+#endif //AS_PHONG
+#ifdef AS_PHYSICAL
+	#include <morphtarget_vertex>
+	#include <skinning_vertex>
+	#include <displacementmap_vertex>
+	#include <project_vertex>
+	#include <logdepthbuf_vertex>
+	#include <clipping_planes_vertex>
+
+	vViewPosition = - mvPosition.xyz;
+
+	#include <worldpos_vertex>
+	#include <shadowmap_vertex>
+	#include <fog_vertex>
+#endif //AS_PHYSICAL
+#ifdef AS_DISTANCE
+    #include <morphtarget_vertex>
+	#include <skinning_vertex>
+	#include <displacementmap_vertex>
+	#include <project_vertex>
+	#include <worldpos_vertex>
+	#include <clipping_planes_vertex>
+
+	vWorldPosition = worldPosition.xyz;
+#endif //AS_DISTANCE
+#ifdef AS_DEPTH
+	#include <morphtarget_vertex>
+	#include <skinning_vertex>
+	#include <displacementmap_vertex>
+	#include <project_vertex>
+	#include <logdepthbuf_vertex>
+	#include <clipping_planes_vertex>
+#endif //AS_DEPTH
+
+#ifdef AS_COORDINATE
+    // vertex_color = vec4(model_pos + vec3(0.5, 0.5, 0.5), 1.0);
 #else
     #ifdef USE_COLORMAP
-        float color_animated = mix(color_previous, color, animation_time_color);
+        float color_animated = mix(color_previous, color_current, animation_time_color);
         float color_index = scale_transform_linear(color_animated, vec2(0.0, 1.0), domain_color);
         vertex_color = texture2D(colormap, vec2(color_index, 0));
     #else
-        vertex_color = mix(color_previous, color, animation_time_color);
+        vertex_color = mix(color_previous, color_current, animation_time_color);
     #endif
 #endif
 }
diff --git a/js/glsl/scatter-fragment.glsl b/js/glsl/scatter-fragment.glsl
index 6b9ddf14..c049189d 100644
--- a/js/glsl/scatter-fragment.glsl
+++ b/js/glsl/scatter-fragment.glsl
@@ -1,38 +1,308 @@
-#include <fog_pars_fragment>
+// scatter-fragment shader
+#if defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+    // extra only used for the default shading
+    varying vec4 vertex_color;
+    // varying vec4 vColor;
+    varying vec3 vertex_position;
+    varying vec2 vertex_uv;
 
-varying vec4 vertex_color;
-varying vec3 vertex_position;
-varying vec2 vertex_uv;
+    #ifdef USE_TEXTURE
+        uniform sampler2D texture;
+        uniform sampler2D texture_previous;
+        uniform float animation_time_texture;
+    #endif
+    // end of extra only used for the default shading
+    // taken similar to phong shading
+    #include <common>
+    #include <packing>
+    #include <dithering_pars_fragment>
+    #include <color_pars_fragment>
+    #include <uv_pars_fragment>
+    #include <uv2_pars_fragment>
+    #include <map_pars_fragment>
+    #include <alphamap_pars_fragment>
+    #include <aomap_pars_fragment>
+    #include <lightmap_pars_fragment>
+    #include <emissivemap_pars_fragment>
+    #include <envmap_pars_fragment>
+    #include <gradientmap_pars_fragment>
+    #include <fog_pars_fragment>
+    #include <bsdfs>
+    #include <lights_pars_begin>
+    // #include <lights_phong_pars_fragment>
+    #include <shadowmap_pars_fragment>
+    #include <shadowmask_pars_fragment> // extra compared to phong
 
-#ifdef USE_TEXTURE
-uniform sampler2D texture;
-uniform sampler2D texture_previous;
-uniform float animation_time_texture;
-#endif
+    #include <bumpmap_pars_fragment>
+    #include <normalmap_pars_fragment>
+    #include <specularmap_pars_fragment>
+    #include <logdepthbuf_pars_fragment>
+    #include <clipping_planes_pars_fragment>
 
 
-void main(void) {
-#ifdef USE_RGB
-    gl_FragColor = vertex_color;
-#else
- #ifdef AS_LINE
-    gl_FragColor = vertex_color;
- #else
-  #ifdef USE_SPRITE
-   #ifdef USE_TEXTURE
-    gl_FragColor = mix(texture2D(texture_previous, vertex_uv), texture2D(texture, vertex_uv), animation_time_texture);
-   #else
-    gl_FragColor = vertex_color;
-   #endif
-  #else
-    vec3 fdx = dFdx( vertex_position );
-    vec3 fdy = dFdy( vertex_position );
-    vec3 normal = normalize( cross( fdx, fdy ) );
-    float diffuse = dot( normal, vec3( 0.0, 0.0, 1.0 ) );
-
-    gl_FragColor = vec4(clamp(diffuse, 0.2, 1.) * vertex_color.rgb, vertex_color.a);
-  #endif
- #endif
-#endif
+void main(void)
+{
+    #ifdef AS_COORDINATE
+        gl_FragColor = vertex_color;
+    #else //AS_COORDINATE
+        // 0 when in shadow, 1 if visible
+        #ifdef IS_LINE
+            gl_FragColor = vertex_color;
+        #else //IS_LINE
+            #ifdef USE_SPRITE
+                #ifdef USE_TEXTURE
+                    gl_FragColor = mix(texture2D(texture_previous, vertex_uv), texture2D(texture, vertex_uv), animation_time_texture);
+                #else
+                    gl_FragColor = vertex_color;
+                #endif //USE_TEXTURE
+            #else //USE_SPRITE
+                vec3 fdxmy = dFdx( vertex_position );
+                vec3 fdymy = dFdy( vertex_position );
+                vec3 normalmy = normalize( cross( fdxmy, fdymy ) );
+                float diffuse = dot( normalmy, vec3( 0.0, 0.0, 1.0 ) );
+
+                gl_FragColor = vec4(clamp(diffuse, 0.2, 1.) * vertex_color.rgb, vertex_color.a);
+            #endif//USE_SPRITE
+            float shadow_visibility = getShadowMask();
+            gl_FragColor.rgb *= shadow_visibility;
+        #endif //IS_LINE
+    #endif //AS_COORDINATE
+    #include <fog_fragment>
+}
+#endif //defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+
+#ifdef AS_LAMBERT
+    #define LAMBERT
+    uniform vec3 diffuse;
+    uniform vec3 emissive;
+    uniform float emissiveIntensity;
+    uniform float opacity;
+
+    varying vec3 vLightFront;
+
+    #ifdef DOUBLE_SIDED
+        varying vec3 vLightBack;
+    #endif
+
+    #include <common>
+    #include <packing>
+    #include <dithering_pars_fragment>
+    #include <color_pars_fragment>
+    #include <uv_pars_fragment>
+    #include <uv2_pars_fragment>
+    #include <map_pars_fragment>
+    #include <alphamap_pars_fragment>
+    #include <aomap_pars_fragment>
+    #include <lightmap_pars_fragment>
+    #include <emissivemap_pars_fragment>
+    #include <envmap_pars_fragment>
+    #include <bsdfs>
+    #include <lights_pars_begin>
+    #include <fog_pars_fragment>
+    #include <shadowmap_pars_fragment>
+    #include <shadowmask_pars_fragment>
+    #include <specularmap_pars_fragment>
+    #include <logdepthbuf_pars_fragment>
+    #include <clipping_planes_pars_fragment>
+#endif //AS_LAMBERT
+#ifdef AS_PHONG
+    #define PHONG
+
+    uniform vec3 diffuse;
+    uniform vec3 emissive;
+    uniform vec3 specular;
+
+    uniform float shininess;
+    uniform float opacity;
+    uniform float emissiveIntensity;
+
+    #include <common>
+    #include <packing>
+    #include <dithering_pars_fragment>
+    #include <color_pars_fragment>
+    #include <uv_pars_fragment>
+    #include <uv2_pars_fragment>
+    #include <map_pars_fragment>
+    #include <alphamap_pars_fragment>
+    #include <aomap_pars_fragment>
+    #include <lightmap_pars_fragment>
+    #include <emissivemap_pars_fragment>
+    #include <envmap_pars_fragment>
+    #include <gradientmap_pars_fragment>
+    #include <fog_pars_fragment>
+    #include <bsdfs>
+    #include <lights_pars_begin>
+    #include <lights_phong_pars_fragment>
+    #include <shadowmap_pars_fragment>
+    #include <bumpmap_pars_fragment>
+    #include <normalmap_pars_fragment>
+    #include <specularmap_pars_fragment>
+    #include <logdepthbuf_pars_fragment>
+    #include <clipping_planes_pars_fragment>
+#endif //AS_PHONG
+#ifdef AS_PHYSICAL
+    #define PHYSICAL
+    uniform vec3 diffuse;
+    uniform vec3 emissive;
+    uniform float roughness;
+    uniform float metalness;
+    uniform float opacity;
+    uniform float emissiveIntensity;
+
+    #ifndef STANDARD
+        uniform float clearCoat;
+        uniform float clearCoatRoughness;
+    #endif
+
+    varying vec3 vViewPosition;
+
+    #ifndef FLAT_SHADED
+        varying vec3 vNormal;
+    #endif
+
+    #include <common>
+    #include <packing>
+    #include <dithering_pars_fragment>
+    #include <color_pars_fragment>
+    #include <uv_pars_fragment>
+    #include <uv2_pars_fragment>
+    #include <map_pars_fragment>
+    #include <alphamap_pars_fragment>
+    #include <aomap_pars_fragment>
+    #include <lightmap_pars_fragment>
+    #include <emissivemap_pars_fragment>
+    #include <bsdfs>
+    #include <cube_uv_reflection_fragment>
+    #include <envmap_pars_fragment>
+    #include <envmap_physical_pars_fragment>
+    #include <fog_pars_fragment>
+    #include <lights_pars_begin>
+    #include <lights_physical_pars_fragment>
+    #include <shadowmap_pars_fragment>
+    #include <bumpmap_pars_fragment>
+    #include <normalmap_pars_fragment>
+    #include <roughnessmap_pars_fragment>
+    #include <metalnessmap_pars_fragment>
+    #include <logdepthbuf_pars_fragment>
+    #include <clipping_planes_pars_fragment>
+
+void main(void)
+{
+	#include <clipping_planes_fragment>
+
+	vec4 diffuseColor = vec4( 1.0, 1.0, 1.0, opacity );
+	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );
+	vec3 totalEmissiveRadiance = emissive * emissiveIntensity;
+
+	#include <logdepthbuf_fragment>
+	#include <map_fragment>
+	//#include <color_fragment>
+
+	#include <alphamap_fragment>
+	#include <alphatest_fragment>
+	#include <roughnessmap_fragment>
+	#include <metalnessmap_fragment>
+	#include <normal_fragment_begin>
+
+	#include <normal_fragment_maps>
+	#include <emissivemap_fragment>
+
+	// accumulation
+	#include <lights_physical_fragment>
+	#include <lights_fragment_begin>
+	#include <lights_fragment_maps>
+	#include <lights_fragment_end>
+
+	// modulation
+	#include <aomap_fragment>
+
+	vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;
+	gl_FragColor = vec4( outgoingLight, diffuseColor.a );
+
+	#include <tonemapping_fragment>
+	#include <encodings_fragment>
 	#include <fog_fragment>
+	#include <premultiplied_alpha_fragment>
+	#include <dithering_fragment>
+
+}
+#endif //AS_PHYSICAL
+#ifdef AS_DISTANCE
+#define DISTANCE
+
+uniform vec3 referencePosition;
+uniform float nearDistance;
+uniform float farDistance;
+varying vec3 vWorldPosition;
+
+#include <common>
+#include <packing>
+#include <uv_pars_fragment>
+#include <map_pars_fragment>
+#include <alphamap_pars_fragment>
+#include <clipping_planes_pars_fragment>
+
+void main () {
+
+	#include <clipping_planes_fragment>
+
+	vec4 diffuseColor = vec4( 1.0 );
+
+	#include <map_fragment>
+	#include <alphamap_fragment>
+	#include <alphatest_fragment>
+
+	float dist = length( vWorldPosition - referencePosition );
+	dist = ( dist - nearDistance ) / ( farDistance - nearDistance );
+	dist = saturate( dist ); // clamp to [ 0, 1 ]
+
+	gl_FragColor = packDepthToRGBA( dist );
+
+}
+#endif//AS_DISTANCE
+
+#ifdef AS_DEPTH
+#if DEPTH_PACKING == 3200
+
+	uniform float opacity;
+
+#endif
+
+#include <common>
+#include <packing>
+#include <uv_pars_fragment>
+#include <map_pars_fragment>
+#include <alphamap_pars_fragment>
+#include <logdepthbuf_pars_fragment>
+#include <clipping_planes_pars_fragment>
+
+void main() {
+
+	#include <clipping_planes_fragment>
+
+	vec4 diffuseColor = vec4( 1.0 );
+
+	#if DEPTH_PACKING == 3200
+
+		diffuseColor.a = opacity;
+
+	#endif
+
+	#include <map_fragment>
+	#include <alphamap_fragment>
+	#include <alphatest_fragment>
+
+	#include <logdepthbuf_fragment>
+
+	#if DEPTH_PACKING == 3200
+
+		gl_FragColor = vec4( vec3( gl_FragCoord.z ), opacity );
+
+	#elif DEPTH_PACKING == 3201
+
+		gl_FragColor = packDepthToRGBA( gl_FragCoord.z );
+
+	#endif
+
 }
+#endif //AS_DEPTH
diff --git a/js/glsl/scatter-vertex.glsl b/js/glsl/scatter-vertex.glsl
index 728cb251..3175ea79 100644
--- a/js/glsl/scatter-vertex.glsl
+++ b/js/glsl/scatter-vertex.glsl
@@ -1,5 +1,4 @@
-#include <fog_pars_vertex>
-
+// scatter-vertex shader
 #define USE_SCALE_X
 #define USE_SCALE_Y
 #define USE_SCALE_Z
@@ -35,55 +34,252 @@ varying vec4 vertex_color;
 varying vec3 vertex_position;
 varying vec2 vertex_uv;
 
-#ifdef AS_LINE
-attribute vec3 position_previous;
+#ifdef IS_LINE
+    attribute vec3 position_previous;
 #else
-attribute float x;
-attribute float x_previous;
-attribute float y;
-attribute float y_previous;
-attribute float z;
-attribute float z_previous;
-attribute float aux;
-attribute float aux_previous;
-
-attribute vec3 v;
-attribute vec3 v_previous;
+    attribute float x_next;
+    attribute float x_previous;
+    attribute float y_next;
+    attribute float y_previous;
+    attribute float z_next;
+    attribute float z_previous;
+    // attribute float aux_next;
+    // attribute float aux_previous;
 
+    attribute vec3 v_next;
+    attribute vec3 v_previous;
 
-attribute float size;
-attribute float size_previous;
+    attribute float size_next;
+    attribute float size_previous;
 #endif
 
 #ifdef USE_COLORMAP
-attribute float color;
-attribute float color_previous;
-uniform vec2 domain_color;
+    attribute float color_next;
+    attribute float color_previous;
+    uniform vec2 domain_color;
 #else
-attribute vec4 color;
-attribute vec4 color_previous;
+    attribute vec4 color_next;
+    attribute vec4 color_previous;
 #endif
 
 uniform sampler2D colormap;
 
+#if defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+    // similar to phong
+    // varying vec3 vColor;
+    #include <common>
+    #include <uv_pars_vertex>
+    #include <uv2_pars_vertex>
+    #include <envmap_pars_vertex>
+    #include <bsdfs>
+    #include <lights_pars_begin>
+    #include <color_pars_vertex>
+    #include <fog_pars_vertex>
+    #include <morphtarget_pars_vertex>
+    #include <skinning_pars_vertex>
+    #include <shadowmap_pars_vertex>
+    #include <logdepthbuf_pars_vertex>
+    #include <clipping_planes_pars_vertex>
+#endif //defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+
+#ifdef AS_LAMBERT
+    #define LAMBERT
+    varying vec3 vLightFront;
+
+    #ifdef DOUBLE_SIDED
+        varying vec3 vLightBack;
+    #endif
+
+    #include <common>
+    #include <uv_pars_vertex>
+    #include <uv2_pars_vertex>
+    #include <envmap_pars_vertex>
+    #include <bsdfs>
+    #include <lights_pars_begin>
+    #include <color_pars_vertex>
+    #include <fog_pars_vertex>
+    #include <morphtarget_pars_vertex>
+    #include <skinning_pars_vertex>
+    #include <shadowmap_pars_vertex>
+    #include <logdepthbuf_pars_vertex>
+    #include <clipping_planes_pars_vertex>
+#endif //AS_LAMBERT
+#ifdef AS_PHONG
+    #define PHONG
+    varying vec3 vViewPosition;
+
+    #ifndef FLAT_SHADED
+        varying vec3 vNormal;
+    #endif
+
+    #include <common>
+    #include <uv_pars_vertex>
+    #include <uv2_pars_vertex>
+    #include <displacementmap_pars_vertex>
+    #include <envmap_pars_vertex>
+    #include <color_pars_vertex>
+    #include <fog_pars_vertex>
+    #include <morphtarget_pars_vertex>
+    #include <skinning_pars_vertex>
+    #include <shadowmap_pars_vertex>
+    #include <logdepthbuf_pars_vertex>
+    #include <clipping_planes_pars_vertex>
+#endif //AS_PHONG
+#ifdef AS_PHYSICAL
+    #define PHYSICAL
+    varying vec3 vViewPosition;
+
+    #ifndef FLAT_SHADED
+        varying vec3 vNormal;
+    #endif
+
+    #include <common>
+    #include <uv_pars_vertex>
+    #include <uv2_pars_vertex>
+    #include <displacementmap_pars_vertex>
+    #include <color_pars_vertex>
+    #include <fog_pars_vertex>
+    #include <morphtarget_pars_vertex>
+    #include <skinning_pars_vertex>
+    #include <shadowmap_pars_vertex>
+    #include <logdepthbuf_pars_vertex>
+    #include <clipping_planes_pars_vertex>
+#endif //AS_PHYSICAL
+#ifdef AS_DEPTH
+    #include <common>
+    #include <uv_pars_vertex>
+    #include <displacementmap_pars_vertex>
+    #include <morphtarget_pars_vertex>
+    #include <skinning_pars_vertex>
+    #include <logdepthbuf_pars_vertex>
+    #include <clipping_planes_pars_vertex>
+#endif //AS_DEPTH
+#ifdef AS_DISTANCE
+    #define DISTANCE
+
+    varying vec3 vWorldPosition;
+
+    #include <common>
+    #include <uv_pars_vertex>
+    #include <displacementmap_pars_vertex>
+    #include <morphtarget_pars_vertex>
+    #include <skinning_pars_vertex>
+    #include <clipping_planes_pars_vertex>
+#endif //AS_DISTANCE
+
 
 void main(void) {
+    // we repeat threejs's shader, up to begin_vertex
+#if defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+    #include <uv_vertex>
+	#include <uv2_vertex>
+	#include <color_vertex>
+
+	#include <beginnormal_vertex>
+	#include <morphnormal_vertex>
+	#include <skinbase_vertex>
+	#include <skinnormal_vertex>
+	#include <defaultnormal_vertex>
+
+	#include <begin_vertex>
+#endif //defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+#ifdef AS_LAMBERT
+    #include <uv_vertex>
+	#include <uv2_vertex>
+	#include <color_vertex>
+
+	#include <beginnormal_vertex>
+	#include <morphnormal_vertex>
+	#include <skinbase_vertex>
+	#include <skinnormal_vertex>
+	#include <defaultnormal_vertex>
+
+	#include <begin_vertex>
+#endif //AS_LAMBERT
+#ifdef AS_PHONG
+	#include <uv_vertex>
+	#include <uv2_vertex>
+	#include <color_vertex>
+
+	#include <beginnormal_vertex>
+	#include <morphnormal_vertex>
+	#include <skinbase_vertex>
+	#include <skinnormal_vertex>
+	#include <defaultnormal_vertex>
+
+    #ifndef FLAT_SHADED // Normal computed with derivatives when FLAT_SHADED
+	    vNormal = normalize( transformedNormal );
+    #endif
+
+	#include <begin_vertex>
+#endif //AS_PHONG
+#ifdef AS_PHYSICAL
+	#include <uv_vertex>
+	#include <uv2_vertex>
+	#include <color_vertex>
+
+	#include <beginnormal_vertex>
+	#include <morphnormal_vertex>
+	#include <skinbase_vertex>
+	#include <skinnormal_vertex>
+	#include <defaultnormal_vertex>
+
+    #ifndef FLAT_SHADED // Normal computed with derivatives when FLAT_SHADED
+	    vNormal = normalize( transformedNormal );
+    #endif
+
+	#include <begin_vertex>
+#endif //AS_PHYSICAL
+#ifdef AS_DEPTH
+	#include <uv_vertex>
+
+	#include <skinbase_vertex>
+
+	#ifdef USE_DISPLACEMENTMAP
+
+		#include <beginnormal_vertex>
+		#include <morphnormal_vertex>
+		#include <skinnormal_vertex>
+
+	#endif
+
+	#include <begin_vertex>
+#endif //AS_DEPTH
+#ifdef AS_DISTANCE
+	#include <uv_vertex>
+
+	#include <skinbase_vertex>
+
+	#ifdef USE_DISPLACEMENTMAP
+
+		#include <beginnormal_vertex>
+		#include <morphnormal_vertex>
+		#include <skinnormal_vertex>
+
+	#endif
+
+	#include <begin_vertex>
+#endif //AS_DISTANCE
+
+    // after begin_vertex, we modify transformed
+
+
     vec3 animation_time = vec3(animation_time_x, animation_time_y, animation_time_z);
     vec3 animation_time_v = vec3(animation_time_vx, animation_time_vy, animation_time_vz);
 
-#ifdef AS_LINE
-    vec3 animated_position = mix(position_previous, position, animation_time);
-    vec3 model_pos = vec3(SCALE_X(animated_position.x), SCALE_Y(animated_position.y), SCALE_Z(animated_position.z));
+#ifdef IS_LINE
+    vec3 position_current = mix(position_previous, position, animation_time);
+    vec3 model_pos = vec3(SCALE_X(position_current.x), SCALE_Y(position_current.y), SCALE_Z(position_current.z));
     vec4 view_pos = modelViewMatrix * vec4(model_pos, 1.0);
 #else
-    vec3 vector = v;
+    vec3 vector_next = v_next;
     vec3 vector_previous = v_previous;
-    vec3 position_offset = vec3(x, y, z);
+    vec3 position_offset_next = vec3(x_next, y_next, z_next);
     vec3 position_offset_previous = vec3(x_previous, y_previous, z_previous);
 
     // assume the vector points to the y axis
-    vec3 vector_current = mix(normalize(vector_previous), normalize(vector), animation_time_v)
-           * mix(length(vector_previous), length(vector), (animation_time_vx+ animation_time_vy+ animation_time_vz)/3.);
+    vec3 vector_current = mix(normalize(vector_previous), normalize(vector_next), animation_time_v)
+           * mix(length(vector_previous), length(vector_next), (animation_time_vx+ animation_time_vy+ animation_time_vz)/3.);
     vec3 y_axis = normalize(vector_current);
     // we may have bad luck, and alight with 1 vector, so take two vectors, and we'll always find a non-zero vector
     vec3 some_z_vector_a = vec3(0., 1., 1.);
@@ -94,12 +290,13 @@ void main(void) {
     // the following matrix should point it to the direction of 'vector'
     mat3 move_to_vector = mat3(x_axis, y_axis, z_axis);
 
-    float size_scalar = mix(size_previous, size, animation_time_size);
+    float size_current = mix(size_previous, size_next, animation_time_size);
     // TODO: replace the 0. in SCALE_SIZE_X(0.) by a uniform, so we can make it work with log?
-    vec3 size_vector = vec3(SCALE_SIZE_X(size_scalar) - SCALE_SIZE_X(0.), SCALE_SIZE_Y(size_scalar) - SCALE_SIZE_Y(0.), SCALE_SIZE_Z(size_scalar) -  SCALE_SIZE_Z(0.));
-    float aux_current = mix(aux_previous, aux, animation_time_aux);
-    vec3 animated_position_offset = mix(position_offset_previous, position_offset, animation_time);
-    vec3 model_pos = vec3(SCALE_X(animated_position_offset.x), SCALE_Y(animated_position_offset.y), SCALE_Z(animated_position_offset.z));
+    vec3 size_vector = vec3(SCALE_SIZE_X(size_current) - SCALE_SIZE_X(0.), SCALE_SIZE_Y(size_current) - SCALE_SIZE_Y(0.), SCALE_SIZE_Z(size_current) -  SCALE_SIZE_Z(0.));
+    // float aux_current = mix(aux_previous, aux_next, animation_time_aux);
+    vec3 position_current_offset = mix(position_offset_previous, position_offset_next, animation_time);
+    vec3 model_pos = vec3(SCALE_X(position_current_offset.x), SCALE_Y(position_current_offset.y), SCALE_Z(position_current_offset.z));
+    // vec3 model_pos = vec3((position_current_offset.x), (position_current_offset.y), (position_current_offset.z));
     SHADER_SNIPPET_SIZE;
     //vec3 pos = (pos_object ) / size;// - 0.5;
     #ifdef USE_SPRITE
@@ -112,25 +309,105 @@ void main(void) {
         vec4 position_transformed = geo_matrix * vec4(position, 1.0);
         position_transformed.xyz = position_transformed.xyz / position_transformed.w;
         model_pos += move_to_vector * (position_transformed.xyz*size_vector);
-        vec4 view_pos = modelViewMatrix * vec4(model_pos, 1.0);
+        vec4 view_pos = viewMatrix * vec4(model_pos, 1.0);
     #endif
+    transformed = model_pos;
 #endif
-    vec4 mvPosition = view_pos;
+    // mvPosition = view_pos;
     gl_Position = projectionMatrix * view_pos;
-    vec3 positionEye = ( modelViewMatrix * vec4( model_pos, 1.0 ) ).xyz;
-    vertex_position = positionEye;
+    // vec3 positionEye = ( modelViewMatrix * vec4( model_pos, 1.0 ) ).xyz;
+    // vertex_position = positionEye;
     vertex_uv = position.xy / 2. - 0.5;
-#ifdef USE_RGB
+#ifdef AS_COORDINATE
     vertex_color = vec4(model_pos + vec3(0.5, 0.5, 0.5), 1.0);
 #else
     #ifdef USE_COLORMAP
-        float color_animated = mix(color_previous, color, animation_time_color);
-        float color_index = scale_transform_linear(color_animated, vec2(0.0, 1.0), domain_color);
+        float color_current = mix(color_previous, color_next, animation_time_color);
+        float color_index = scale_transform_linear(color_current, vec2(0.0, 1.0), domain_color);
         vertex_color = texture2D(colormap, vec2(color_index, 0));
     #else
-        vertex_color = mix(color_previous, color, animation_time_color);
+        vertex_color = mix(color_previous, color_next, animation_time_color);
     #endif
 #endif
 
-    #include <fog_vertex>
+
+#if defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+    vColor = vertex_color.rgb;
+	#include <morphtarget_vertex>
+	#include <skinning_vertex>
+	#include <displacementmap_vertex>
+	#include <project_vertex>
+	#include <logdepthbuf_vertex>
+	#include <clipping_planes_vertex>
+
+
+	#include <worldpos_vertex>
+    vec3 positionEye = ( modelViewMatrix * vec4(transformed, 1.0 ) ).xyz;
+    vertex_position = positionEye;
+	// vViewPosition = - mvPosition.xyz;
+	// #include <envmap_vertex>
+	#include <shadowmap_vertex>
+	#include <fog_vertex>    
+#endif // defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+#ifdef AS_LAMBERT
+	#include <morphtarget_vertex>
+	#include <skinning_vertex>
+	#include <project_vertex>
+	#include <logdepthbuf_vertex>
+	#include <clipping_planes_vertex>
+
+	#include <worldpos_vertex>
+	#include <envmap_vertex>
+	#include <lights_lambert_vertex>
+	#include <shadowmap_vertex>
+	#include <fog_vertex>
+#endif //AS_LAMBERT
+#ifdef AS_PHONG
+	#include <morphtarget_vertex>
+	#include <skinning_vertex>
+	#include <displacementmap_vertex>
+	#include <project_vertex>
+	#include <logdepthbuf_vertex>
+	#include <clipping_planes_vertex>
+
+	vViewPosition = - mvPosition.xyz;
+
+	#include <worldpos_vertex>
+	#include <envmap_vertex>
+	#include <shadowmap_vertex>
+	#include <fog_vertex>
+#endif //AS_PHONG
+#ifdef AS_PHYSICAL
+    vColor = vertex_color.rgb;
+	#include <morphtarget_vertex>
+	#include <skinning_vertex>
+	#include <displacementmap_vertex>
+	#include <project_vertex>
+	#include <logdepthbuf_vertex>
+	#include <clipping_planes_vertex>
+
+	vViewPosition = - mvPosition.xyz;
+
+	#include <worldpos_vertex>
+	#include <shadowmap_vertex>
+	#include <fog_vertex>
+#endif //AS_PHYSICAL
+#ifdef AS_DISTANCE
+    #include <morphtarget_vertex>
+	#include <skinning_vertex>
+	#include <displacementmap_vertex>
+	#include <project_vertex>
+	#include <worldpos_vertex>
+	#include <clipping_planes_vertex>
+
+	vWorldPosition = worldPosition.xyz;
+#endif //AS_DISTANCE
+#ifdef AS_DEPTH
+	#include <morphtarget_vertex>
+	#include <skinning_vertex>
+	#include <displacementmap_vertex>
+	#include <project_vertex>
+	#include <logdepthbuf_vertex>
+	#include <clipping_planes_vertex>
+#endif //AS_DEPTH
 }
diff --git a/js/src/figure.ts b/js/src/figure.ts
index 9bc22a65..169a4c2f 100644
--- a/js/src/figure.ts
+++ b/js/src/figure.ts
@@ -105,6 +105,7 @@ class FigureModel extends widgets.DOMWidgetModel {
     static serializers = {...widgets.DOMWidgetModel.serializers,
         scatters: { deserialize: widgets.unpack_models },
         meshes: { deserialize: widgets.unpack_models },
+        lights: { deserialize: widgets.unpack_models },
         volumes: { deserialize: widgets.unpack_models },
         camera: { deserialize: widgets.unpack_models },
         scene: { deserialize: widgets.unpack_models },
@@ -134,6 +135,7 @@ class FigureModel extends widgets.DOMWidgetModel {
             displayscale: 1,
             scatters: null,
             meshes: null,
+            lights: null,
             volumes: null,
             show: "Volume",
             scales: {},
@@ -210,6 +212,7 @@ class FigureView extends widgets.DOMWidgetView {
     mesh_views: { [key: string]: MeshView };
     scatter_views: { [key: string]: ScatterView };
     volume_views: { [key: string]: VolumeView };
+    lights: { [key: string]: THREE.Light };
     volume_back_target: THREE.WebGLRenderTarget;
     geometry_depth_target: THREE.WebGLRenderTarget;
     color_pass_target: THREE.WebGLRenderTarget;
@@ -908,6 +911,8 @@ class FigureView extends widgets.DOMWidgetView {
         this.update_meshes();
         this.model.on("change:volumes", this.update_volumes, this);
         this.update_volumes();
+        this.model.on("change:lights", this.update_lights, this);
+        this.update_lights();
 
         this.update_size();
 
@@ -1616,6 +1621,68 @@ class FigureView extends widgets.DOMWidgetView {
         }
     }
 
+    async update_lights() {
+
+        // Initialize lights if this is the first pass
+        if (!this.lights) {
+            this.lights = {}
+        }
+
+        const lights = this.model.get("lights");
+        if (lights.length !== 0) { // So now check if list has length 0
+            // Change mesh lighting model
+            const current_light_cids = [];
+            lights.forEach(async (light_model) => {
+                if (!(light_model.cid in this.lights)) {
+                    const light = light_model.obj;
+                    if (light.castShadow) {
+                        this.update_shadows();
+                    }
+
+                    const on_light_change = () => {
+                        if (light.castShadow) {
+                            this.update_shadows();
+                        }
+
+                        this.update();
+                    }
+
+                    light_model.on("change", on_light_change);
+                    light_model.on("childchange", on_light_change);
+
+                    this.lights[light_model.cid] = light;
+
+                    if (light.target) {
+                        this.scene_scatter.add(light.target);
+                    }
+                    this.scene_scatter.add(light);
+                }
+
+                // Do not delete current lights
+                current_light_cids.push(light_model.cid);
+            });
+
+            // Remove previous lights
+            for (const cid of Object.keys(this.lights)) {
+                const light = this.lights[cid];
+
+                if (current_light_cids.indexOf(cid) === -1) {
+                    this.scene_scatter.remove(light);
+                    delete this.lights[cid];
+                }
+            }
+
+            this.update();
+        }
+    }
+
+    update_shadows() {
+        // Activate shadow mapping
+        this.renderer.shadowMap.enabled = true
+        this.renderer.shadowMap.type = THREE.PCFSoftShadowMap;
+        // TODO: when do we disable shadow mapping?
+    }
+
     transition(f, on_done, context) {
         const that = this;
         const exp = that.model.get("animation_exponent");
diff --git a/js/src/mesh.ts b/js/src/mesh.ts
index 6649de31..ca8abeb1 100644
--- a/js/src/mesh.ts
+++ b/js/src/mesh.ts
@@ -2,11 +2,15 @@ import * as widgets from "@jupyter-widgets/base";
 import { isArray, isEqual, isNumber, isString } from "lodash";
 import * as THREE from "three";
 import { FigureView } from "./figure";
-import { createColormap, patchMaterial, scaleTypeMap } from "./scales";
+import { MeshDepthMaterialCustom, MeshDistanceMaterialCustom } from "./materials";
+import { createColormap, patchShader, scaleTypeMap } from "./scales";
 import * as serialize from "./serialize.js";
-import { semver_range } from "./utils";
+import { materialToLightingModel, semver_range } from "./utils";
 import * as values from "./values.js";
 
+const vertexShader = (require("raw-loader!../glsl/mesh-vertex.glsl") as any).default;
+const fragmentShader = (require("raw-loader!../glsl/mesh-fragment.glsl") as any).default;
+
 export
 class MeshView extends widgets.WidgetView {
     renderer: FigureView;
@@ -28,9 +32,13 @@ class MeshView extends widgets.WidgetView {
     texture_loader: any;
     textures: any;
     texture_video: any;
+
+    lighting_model: any;
+
     render() {
         // console.log("created mesh view, parent is")
         // console.log(this.options.parent)
+
         this.renderer = this.options.parent;
         this.previous_values = {};
         this.attributes_changed = {};
@@ -58,13 +66,16 @@ class MeshView extends widgets.WidgetView {
                 texture: { type: "t", value: null },
                 texture_previous: { type: "t", value: null },
                 colormap: {type: "t", value: null},
-        };
+            };
+
         const get_material = (name)  => {
             if (this.model.get(name)) {
                 return this.model.get(name).obj.clone();
             } else {
                 const mat = new THREE.ShaderMaterial();
                 mat.side = THREE.DoubleSide;
+                mat.needsUpdate = true;
+
                 return mat;
             }
 
@@ -82,30 +93,24 @@ class MeshView extends widgets.WidgetView {
         if (this.model.get("material")) {
             this.model.get("material").on("change", () => {
                 this._update_materials();
-                this.renderer.update();
             });
         }
         if (this.model.get("line_material")) {
             this.model.get("line_material").on("change", () => {
                 this._update_materials();
-                this.renderer.update();
             });
         }
 
         this._update_color_scale();
         this.create_mesh();
         this.add_to_scene();
+
         this.model.on("change:color change:sequence_index change:x change:y change:z change:v change:u change:triangles change:lines",
             this.on_change, this);
         this.model.on("change:geo change:connected", this.update_, this);
         this.model.on("change:color_scale", this._update_color_scale, this);
         this.model.on("change:texture", this._load_textures, this);
-        this.model.on("change:visible", this.update_visibility, this);
-    }
-
-    public update_visibility() {
-        this._update_materials();
-        this.renderer.update();
+        this.model.on("change:visible change:lighting_model change:opacity change:material", this._update_materials, this);
     }
 
     public _load_textures() {
@@ -140,8 +145,7 @@ class MeshView extends widgets.WidgetView {
     set_scales(scales) {
         const new_scale_defines = {};
         for (const key of Object.keys(scales)) {
-            this.material.uniforms[`domain_${key}`].value = scales[key].domain;
-            this.material_rgb.uniforms[`domain_${key}`].value = scales[key].domain;
+            this.uniforms[`domain_${key}`].value = scales[key].domain;
             new_scale_defines[`SCALE_TYPE_${key}`] = scaleTypeMap[scales[key].type];
         }
         if (!isEqual(this.scale_defines, new_scale_defines) ) {
@@ -156,6 +160,14 @@ class MeshView extends widgets.WidgetView {
         });
     }
 
+    update_shadow() {
+        // TODO: we don't have this yet in scatter (inconsistent)
+        this.meshes.forEach((mesh) => {
+            mesh.castShadow = this.model.get("cast_shadow");
+            mesh.receiveShadow = this.model.get("receive_shadow");
+        });
+    }
+
     remove_from_scene() {
         this.meshes.forEach((mesh) => {
             this.renderer.scene_scatter.remove(mesh);
@@ -192,7 +204,6 @@ class MeshView extends widgets.WidgetView {
                     // console.log("adding size to list of changed attributes")
                     // this.attributes_changed["size"] = []
                 }
-
             }
         }
         this.update_();
@@ -202,7 +213,7 @@ class MeshView extends widgets.WidgetView {
         this.remove_from_scene();
         this.create_mesh();
         this.add_to_scene();
-        this.renderer.update();
+        this._update_materials();
     }
 
     _get_value(value, index, default_value) {
@@ -341,26 +352,34 @@ class MeshView extends widgets.WidgetView {
         if (this.model.get("line_material")) {
             this.line_material_rgb.copy(this.model.get("line_material").obj);
         }
-        this.material.defines = {...this.scale_defines};
-        this.material.defines.USE_COLORMAP = this.model.get("color_scale") !== null;
-        this.material_rgb.defines = {USE_RGB: true, ...this.scale_defines};
-        this.line_material.defines = {AS_LINE: true, ...this.scale_defines};
-        this.line_material_rgb.defines = {AS_LINE: true, USE_RGB: true, ...this.scale_defines};
+        this.lighting_model = materialToLightingModel(this.material);
+        // update material defines in order to run correct shader code
+        this.material.defines = {USE_COLOR: true,  USE_COLORMAP: this.model.get("color_scale") !== null, ...this.scale_defines};
+        this.material.defines[`AS_${this.lighting_model}`] = true;
         this.material.extensions = {derivatives: true};
+        this.material_rgb.defines = {AS_COORDINATE: true, USE_COLOR: true, ...this.scale_defines};
+        this.line_material.defines = {IS_LINE: true, ...this.scale_defines};
+        this.line_material.defines[`AS_${this.lighting_model}`] = true;
+        this.line_material_rgb.defines = {IS_LINE: true, AS_COORDINATE: true, USE_COLOR: true, ...this.scale_defines};
+
         // locally and the visible with this object's visible trait
         this.material.visible = this.material.visible && this.model.get("visible");
         this.material_rgb.visible = this.material.visible && this.model.get("visible");
         this.line_material.visible = this.line_material.visible && this.model.get("visible");
         this.line_material_rgb.visible = this.line_material.visible && this.model.get("visible");
+
         this.materials.forEach((material) => {
-            material.vertexShader = (require("raw-loader!../glsl/mesh-vertex.glsl") as any).default;
-            material.fragmentShader = (require("raw-loader!../glsl/mesh-fragment.glsl") as any).default;
-            material.uniforms = this.uniforms;
-            material.depthWrite = true;
-            material.transparant = true;
-            material.depthTest = true;
-            patchMaterial(material);
+            material.onBeforeCompile = (shader) => {
+                shader.vertexShader = vertexShader;
+                shader.fragmentShader = fragmentShader;
+                shader.uniforms = {...shader.uniforms, ...this.uniforms};
+                patchShader(shader);
+            };
+            material.needsUpdate = true;
         });
+
+        this.update_shadow();
+
         const texture = this.model.get("texture");
         if (texture && this.textures) {
             this.material.defines.USE_TEXTURE = true;
@@ -369,6 +388,8 @@ class MeshView extends widgets.WidgetView {
         this.material_rgb.needsUpdate = true;
         this.line_material.needsUpdate = true;
         this.line_material_rgb.needsUpdate = true;
+
+        this.renderer.update();
     }
 
     create_mesh() {
@@ -480,10 +501,11 @@ class MeshView extends widgets.WidgetView {
             geometry.addAttribute("position", new THREE.BufferAttribute(current.array_vec3.vertices, 3));
             geometry.addAttribute("position_previous", new THREE.BufferAttribute(previous.array_vec3.vertices, 3));
             if (this.model.get("color_scale")) {
-                geometry.addAttribute("color", new THREE.BufferAttribute(current.array.color, 1));
+                // TODO: similar as in scatter, we should use previous and next
+                geometry.addAttribute("color_current", new THREE.BufferAttribute(current.array.color, 1));
                 geometry.addAttribute("color_previous", new THREE.BufferAttribute(previous.array.color, 1));
             } else {
-                geometry.addAttribute("color", new THREE.BufferAttribute(current.array_vec4.color, 4));
+                geometry.addAttribute("color_current", new THREE.BufferAttribute(current.array_vec4.color, 4));
                 geometry.addAttribute("color_previous", new THREE.BufferAttribute(previous.array_vec4.color, 4));
             }
             geometry.setIndex(new THREE.BufferAttribute(triangles, 1));
@@ -502,13 +524,35 @@ class MeshView extends widgets.WidgetView {
                 geometry.addAttribute("u_previous", new THREE.BufferAttribute(u_previous, 1));
                 geometry.addAttribute("v_previous", new THREE.BufferAttribute(v_previous, 1));
             }
+            geometry.computeVertexNormals();
 
             this.surface_mesh = new THREE.Mesh(geometry, this.material);
+            this.surface_mesh.customDepthMaterial = new MeshDepthMaterialCustom(() => {
+                const defines = {...this.material.defines};
+                // unset lighting model
+                delete defines[`AS_${this.lighting_model}`];
+                return {AS_DEPTH: true, ...defines};
+            }, this.uniforms, vertexShader, fragmentShader, {
+                depthPacking: THREE.RGBADepthPacking,
+                alphaTest: 0.5,
+            });
+            this.surface_mesh.customDistanceMaterial = new MeshDistanceMaterialCustom(() => {
+                const defines = {...this.material.defines};
+                // unset lighting model
+                delete defines[`AS_${this.lighting_model}`];
+                return {AS_DISTANCE: true, ...defines};
+            }, this.uniforms, vertexShader, fragmentShader, {
+                depthPacking: THREE.RGBADepthPacking,
+                alphaTest: 0.5,
+            });
             // BUG? because of our custom shader threejs thinks our object if out
             // of the frustum
             this.surface_mesh.frustumCulled = false;
             this.surface_mesh.material_rgb = this.material_rgb;
             this.surface_mesh.material_normal = this.material;
+            this.surface_mesh.castShadow = this.model.get("cast_shadow");
+            this.surface_mesh.receiveShadow = this.model.get("receive_shadow");
+
             this.meshes.push(this.surface_mesh);
         }
 
@@ -528,7 +572,7 @@ class MeshView extends widgets.WidgetView {
                 color_previous = new THREE.BufferAttribute(previous.array_vec4.color, 4);
             }
             color.normalized = true;
-            geometry.addAttribute("color", color);
+            geometry.addAttribute("color_current", color);
             color_previous.normalized = true;
             geometry.addAttribute("color_previous", color_previous);
             const indices = new Uint32Array(lines[0]);
@@ -543,6 +587,7 @@ class MeshView extends widgets.WidgetView {
         } else {
             this.line_segments = null;
         }
+        this.update_shadow();
 
         for (const key of Object.keys(this.attributes_changed)) {
             const changed_properties = this.attributes_changed[key];
@@ -556,7 +601,7 @@ class MeshView extends widgets.WidgetView {
             // uniforms of material_rgb has a reference to these same object
             // this.renderer.transition(this.material.uniforms[property], "value", done, this)
             this.renderer.transition((value) => {
-                this.material.uniforms[property].value = time_offset + time_delta * value;
+                this.uniforms[property].value = time_offset + time_delta * value;
             }, done, this);
         }
         this.attributes_changed = {};
@@ -588,7 +633,7 @@ class MeshModel extends widgets.WidgetModel {
             _model_module : "ipyvolume",
             _view_module : "ipyvolume",
             _model_module_version: semver_range,
-                _view_module_version: semver_range,
+            _view_module_version: semver_range,
             color: "red",
             color_scale: null,
             sequence_index: 0,
@@ -596,6 +641,8 @@ class MeshModel extends widgets.WidgetModel {
             visible: true,
             visible_lines: true,
             visible_faces: true,
+            cast_shadow : true,
+            receive_shadow : true,
         };
     }
 }
diff --git a/js/src/scales.ts b/js/src/scales.ts
index 9181bb9d..cc1c136d 100644
--- a/js/src/scales.ts
+++ b/js/src/scales.ts
@@ -16,14 +16,19 @@ const scaleTypeMap = {
 export
 function patchMaterial(material: any) {
     material.onBeforeCompile = (shader) => {
-        shader.vertexShader = // this is the fragment program string in the template format
-        shader.vertexShader.replace( // we have to transform the string
-            "#include <scales>", // we will swap out this chunk
-            shader_scales,
-        );
+        patchShader(shader);
     };
 }
 
+export
+function patchShader(shader: any) {
+    shader.vertexShader = // this is the fragment program string in the template format
+    shader.vertexShader.replace( // we have to transform the string
+        "#include <scales>", // we will swap out this chunk
+        shader_scales,
+    );
+}
+
 export
 function createD3Scale(scale) {
     if (scale.type === "linear") {
diff --git a/js/src/scatter.ts b/js/src/scatter.ts
index fb3c034c..d6b72342 100644
--- a/js/src/scatter.ts
+++ b/js/src/scatter.ts
@@ -1,13 +1,17 @@
 import * as widgets from "@jupyter-widgets/base";
 import { isArray, isEqual, isNumber } from "lodash";
 import * as THREE from "three";
-import { createColormap, patchMaterial, scaleTypeMap } from "./scales";
+import { MeshDepthMaterialCustom, MeshDistanceMaterialCustom } from "./materials";
+import { createColormap, patchShader, scaleTypeMap } from "./scales";
 import * as serialize from "./serialize.js";
-import { semver_range } from "./utils";
+import { materialToLightingModel, semver_range } from "./utils";
 import * as values from "./values.js";
 // tslint:disable-next-line: no-var-requires
 const cat_data = require("../data/cat.json");
 
+const vertexShader = (require("raw-loader!../glsl/scatter-vertex.glsl") as any).default;
+const fragmentShader = (require("raw-loader!../glsl/scatter-fragment.glsl") as any).default;
+
 export
 class ScatterView extends widgets.WidgetView {
     renderer: any;
@@ -23,13 +27,17 @@ class ScatterView extends widgets.WidgetView {
         triangle_2d: THREE.CircleGeometry; };
     material: any;
     material_rgb: any;
+    material_depth: any;
     line_material: any;
     line_material_rgb: any;
     materials: any[];
     texture_video: HTMLVideoElement;
     line_segments: any;
     mesh: any;
+    lighting_model : any;
+
     render() {
+
         this.renderer = this.options.parent;
         this.previous_values = {};
         this.attributes_changed = {};
@@ -127,17 +135,16 @@ class ScatterView extends widgets.WidgetView {
         this.line_material = get_material("line_material");
         this.line_material_rgb = get_material("line_material");
         this.materials = [this.material, this.material_rgb, this.line_material, this.line_material_rgb];
+
         this._update_materials();
         if (this.model.get("material")) {
             this.model.get("material").on("change", () => {
                 this._update_materials();
-                this.renderer.update();
             });
         }
         if (this.model.get("line_material")) {
             this.model.get("line_material").on("change", () => {
                 this._update_materials();
-                this.renderer.update();
             });
         }
         this.model.on("change:geo_matrix", () => {
@@ -158,10 +165,9 @@ class ScatterView extends widgets.WidgetView {
         this.model.on("change:geo change:connected", this.update_, this);
         this.model.on("change:color_scale", this._update_color_scale, this);
         this.model.on("change:texture", this._load_textures, this);
-        this.model.on("change:visible", this.update_visibility, this);
+        this.model.on("change:visible", this._update_materials, this);
         this.model.on("change:geo", () => {
             this._update_materials();
-            this.renderer.update();
         });
         const update_scale = (name) => {
             const scale_name = name + "_scale";
@@ -215,7 +221,9 @@ class ScatterView extends widgets.WidgetView {
             this.model.on(`change:${name}_scale`, updater, this);
         });
 
+        this.model.on("change:material change:cast_shadow change:receive_shadow", this._update_materials, this);
     }
+
     _load_textures() {
         const texture = this.model.get("texture");
         if (texture.stream) { // instanceof media.MediaStreamModel) {
@@ -241,15 +249,11 @@ class ScatterView extends widgets.WidgetView {
             );
         }
     }
-    update_visibility() {
-        this._update_materials();
-        this.renderer.update();
-    }
+
     set_scales(scales) {
         const new_scale_defines = {...this.scale_defines};
         for (const key of Object.keys(scales)) {
-            this.material.uniforms[`domain_${key}`].value = scales[key].domain;
-            this.material_rgb.uniforms[`domain_${key}`].value = scales[key].domain;
+            this.uniforms[`domain_${key}`].value = scales[key].domain;
             new_scale_defines[`SCALE_TYPE_${key}`] = scaleTypeMap[scales[key].type];
         }
         if (!isEqual(this.scale_defines, new_scale_defines) ) {
@@ -275,7 +279,6 @@ class ScatterView extends widgets.WidgetView {
         }
     }
     on_change() {
-        console.log(this.model.changedAttributes());
         for (const key of Object.keys(this.model.changedAttributes())) {
             this.previous_values[key] = this.model.previous(key);
             // attributes_changed keys will say what needs to be animated, it's values are the properties in
@@ -323,7 +326,7 @@ class ScatterView extends widgets.WidgetView {
             return value;
         }
     }
-    get_current(name, index, default_value) {
+    get_next(name, index, default_value) {
         return this._get_value(this.model.get(name), index, default_value);
     }
     get_previous(name, index, default_value) {
@@ -339,7 +342,7 @@ class ScatterView extends widgets.WidgetView {
             return value;
         }
     }
-    get_current_vec3(name, index, default_value) {
+    get_next_vec3(name, index, default_value) {
         return this._get_value_vec3(this.model.get(name), index, default_value);
     }
     get_previous_vec3(name, index, default_value) {
@@ -400,6 +403,7 @@ class ScatterView extends widgets.WidgetView {
         this.renderer.update();
     }
      _update_materials() {
+
         if (this.model.get("material")) {
             this.material.copy(this.model.get("material").obj);
         }
@@ -415,33 +419,39 @@ class ScatterView extends widgets.WidgetView {
             this.line_material_rgb.linewidth = this.line_material.linewidth = this.model.get("line_material").obj.linewidth;
         }
 
+        // TODO: lighting_model for lines could be different
+        this.lighting_model = materialToLightingModel(this.material)
         const shader_snippets = this.model.get('shader_snippets');
         const snippet_defines = {};
         for (const key of Object.keys(shader_snippets)) {
             snippet_defines["SHADER_SNIPPET_" + key.toUpperCase()] = shader_snippets[key];
         }
-
-        this.material.defines = {USE_COLORMAP: this.model.get("color_scale") !== null, ...this.scale_defines, ...snippet_defines};
+        this.material.defines = {USE_COLOR: true, USE_COLORMAP: this.model.get("color_scale") !== null, ...this.scale_defines, ...snippet_defines};
+        this.material.defines[`AS_${this.lighting_model}`] = true;
         this.material.extensions = {derivatives: true};
-        this.material_rgb.defines = {USE_RGB: true, ...this.scale_defines, ...snippet_defines};
+        this.material_rgb.defines = {AS_COORDINATE: true, USE_COLOR: true, ...this.scale_defines, ...snippet_defines};
         this.material_rgb.extensions = {derivatives: true};
-        this.line_material.defines = {AS_LINE: true, ...this.scale_defines,  ...snippet_defines};
-        this.line_material_rgb.defines = {USE_RGB: true, AS_LINE: true};
+        this.line_material.defines = {IS_LINE: true, USE_COLOR: true, ...this.scale_defines,  ...snippet_defines};
+        this.line_material.defines[`AS_${this.lighting_model}`] = true;
+        this.line_material_rgb.defines = {AS_COORDINATE: true, IS_LINE: true, USE_COLOR: true};
         // locally and the visible with this object's visible trait
         this.material.visible = this.material.visible && this.model.get("visible");
         this.material_rgb.visible = this.material.visible && this.model.get("visible");
         this.line_material.visible = this.line_material.visible && this.model.get("visible");
         this.line_material_rgb.visible = this.line_material.visible && this.model.get("visible");
+
+
+
         this.materials.forEach((material) => {
-            material.vertexShader = (require("raw-loader!../glsl/scatter-vertex.glsl") as any).default;
-            material.fragmentShader = (require("raw-loader!../glsl/scatter-fragment.glsl") as any).default;
-            material.uniforms = {...material.uniforms, ...this.uniforms};
-            material.depthWrite = true;
-            material.transparant = true;
-            material.depthTest = true;
+            material.onBeforeCompile = (shader) => {
+                shader.vertexShader = vertexShader;
+                shader.fragmentShader = fragmentShader;
+                shader.uniforms = {...shader.uniforms, ...this.uniforms};
+                patchShader(shader);
+            };
             material.needsUpdate = true;
-            patchMaterial(material);
         });
+
         const geo = this.model.get("geo");
         const sprite = geo.endsWith("2d");
         if (sprite) {
@@ -458,6 +468,8 @@ class ScatterView extends widgets.WidgetView {
         this.material_rgb.needsUpdate = true;
         this.line_material.needsUpdate = true;
         this.line_material_rgb.needsUpdate = true;
+
+        this.renderer.update();
     }
     create_mesh() {
         let geo = this.model.get("geo");
@@ -484,49 +496,49 @@ class ScatterView extends widgets.WidgetView {
         } else {
             vector4_names.push("color", "color_selected");
         }
-        const current  = new values.Values(scalar_names, [], this.get_current.bind(this), sequence_index, vector4_names);
+        const next  = new values.Values(scalar_names, [], this.get_next.bind(this), sequence_index, vector4_names);
         const previous = new values.Values(scalar_names, [], this.get_previous.bind(this), sequence_index_previous, vector4_names);
 
-        const length = Math.max(current.length, previous.length);
+        const length = Math.max(next.length, previous.length);
         if (length === 0) {
             console.error("no single member is an array, not supported (yet?)");
         }
 
-        current.trim(current.length); // make sure all arrays are of equal length
+        next.trim(next.length); // make sure all arrays are of equal length
         previous.trim(previous.length);
         const previous_length = previous.length;
-        const current_length = current.length;
+        const next_length = next.length;
         if (this.model.get("selected") || this.previous_values.selected) {
             // upgrade size and size_previous to an array if they were not already
-            current.ensure_array(["size", "size_selected", "color", "color_selected"]);
+            next.ensure_array(["size", "size_selected", "color", "color_selected"]);
             previous.ensure_array(["size", "size_selected", "color", "color_selected"]);
-            let selected = this.get_current("selected", sequence_index, []);
-            current.select(selected);
+            let selected = this.get_next("selected", sequence_index, []);
+            next.select(selected);
             selected = this.get_previous("selected", sequence_index_previous, []);
             previous.select(selected);
         }
         // if we have a change in length, we use size to fade in/out particles, so make sure they are arrays
-        if (current.length !== previous.length) {
-            current.ensure_array("size");
+        if (next.length !== previous.length) {
+            next.ensure_array("size");
             previous.ensure_array("size");
         }
-        if (current.length > previous.length) { // grow..
-            previous.pad(current);
+        if (next.length > previous.length) { // grow..
+            previous.pad(next);
             (previous.array.size as any).fill(0, previous_length); // this will make them smoothly fade in
-        } else if (current.length < previous.length) { // shrink..
-            current.pad(previous);
-            (current.array.size as any).fill(0, current_length); // this will make them smoothly fade out
+        } else if (next.length < previous.length) { // shrink..
+            next.pad(previous);
+            (next.array.size as any).fill(0, next_length); // this will make them smoothly fade out
         }
         // we are only guaranteed to have 16 attributes for the shader, so better merge some into single vectors
-        current.merge_to_vec3(["vx", "vy", "vz"], "v");
+        next.merge_to_vec3(["vx", "vy", "vz"], "v");
         previous.merge_to_vec3(["vx", "vy", "vz"], "v");
 
         // we don't want to send these to the shader, these are handled at the js side
-        current.pop(["size_selected", "color_selected"]);
+        next.pop(["size_selected", "color_selected"]);
         previous.pop(["size_selected", "color_selected"]);
 
-        // add atrributes to the geometry, this makes the available to the shader
-        current.add_attributes(instanced_geo);
+        // add attributes to the geometry, this makes them available to the shader
+        next.add_attributes(instanced_geo, "_next");
         previous.add_attributes(instanced_geo, "_previous");
         if (sprite) {
             const texture = this.model.get("texture");
@@ -536,30 +548,64 @@ class ScatterView extends widgets.WidgetView {
                 this.material.uniforms.texture_previous.value = this.textures[sequence_index_previous % this.textures.length];
             }
         }
+        instanced_geo.computeVertexNormals();
         this.mesh = new THREE.Mesh(instanced_geo, this.material);
+        this.mesh.castShadow = this.model.get("cast_shadow");
+        this.mesh.receiveShadow = this.model.get("receive_shadow");
+        // We use the approach used in https://codepen.io/Fyrestar/pen/JqqGZQ
+        // see also https://discourse.threejs.org/t/shadow-for-instances/7947/7
+        // or https://jsfiddle.net/mikatalk/4fn1oqz9/
+
+        this.mesh.customDepthMaterial = new MeshDepthMaterialCustom(() => {
+            const defines = {...this.material.defines};
+            delete defines[`AS_${this.lighting_model}`];
+            const as_sprite = this.model.get("geo").endsWith("2d");
+            if (as_sprite) {
+                defines.AS_SPRITE = true;
+            }
+            return {AS_DEPTH: true, ...defines};
+        }, this.uniforms, vertexShader, fragmentShader, {
+            depthPacking: THREE.RGBADepthPacking,
+            alphaTest: 0.5,
+        });
+        this.mesh.customDistanceMaterial = new MeshDistanceMaterialCustom(() => {
+            const defines = {...this.material.defines};
+            delete defines[`AS_${this.lighting_model}`];
+            const as_sprite = this.model.get("geo").endsWith("2d");
+            if (as_sprite) {
+                defines.AS_SPRITE = true;
+            }
+            return {AS_DISTANCE: true, ...defines};
+        }, this.uniforms, vertexShader, fragmentShader, {
+            depthPacking: THREE.RGBADepthPacking,
+            alphaTest: 0.5,
+        });
         this.mesh.material_rgb = this.material_rgb;
         this.mesh.material_normal = this.material;
 
         if (this.model.get("connected")) {
             const geometry = new THREE.BufferGeometry();
 
-            current.merge_to_vec3(["x", "y", "z"], "vertices");
+            next.merge_to_vec3(["x", "y", "z"], "vertices");
             previous.merge_to_vec3(["x", "y", "z"], "vertices");
-            geometry.addAttribute("position", new THREE.BufferAttribute(current.array_vec3.vertices, 3));
+            geometry.addAttribute("position", new THREE.BufferAttribute(next.array_vec3.vertices, 3));
             geometry.addAttribute("position_previous", new THREE.BufferAttribute(previous.array_vec3.vertices, 3));
 
-            current.ensure_array(["color"]);
+            next.ensure_array(["color"]);
             previous.ensure_array(["color"]);
             if (this.model.get("color_scale")) {
-                geometry.addAttribute("color", new THREE.BufferAttribute(current.array.color, 1));
+                geometry.addAttribute("color_next", new THREE.BufferAttribute(next.array.color, 1));
                 geometry.addAttribute("color_previous", new THREE.BufferAttribute(previous.array.color, 1));
             } else {
-                geometry.addAttribute("color", new THREE.BufferAttribute(current.array_vec4.color, 4));
+                geometry.addAttribute("color_next", new THREE.BufferAttribute(next.array_vec4.color, 4));
                 geometry.addAttribute("color_previous", new THREE.BufferAttribute(previous.array_vec4.color, 4));
             }
+            geometry.computeVertexNormals();
 
             this.line_segments = new THREE.Line(geometry, this.line_material);
             this.line_segments.frustumCulled = false;
+            this.line_segments.castShadow = this.model.get("cast_shadow");
+            this.line_segments.receiveShadow = this.model.get("receive_shadow");
         } else {
             this.line_segments = null;
         }
@@ -573,9 +619,9 @@ class ScatterView extends widgets.WidgetView {
                     delete this.previous_values[prop]; // may happen multiple times, that is ok
                 });
             };
-            // uniforms of material_rgb has a reference to these same object
+            // all materials share the same uniforms
             const set = (value) => {
-                this.material.uniforms[property].value = value;
+                this.uniforms[property].value = value;
             };
             this.renderer.transition(set, done, this);
         }
@@ -628,7 +674,9 @@ class ScatterModel extends widgets.WidgetModel {
             connected: false,
             visible: true,
             selected: null,
-            shader_snippets: {size: '\n'}
+            shader_snippets: {size: '\n'},
+            cast_shadow : true,
+            receive_shadow : true,
         };
     }
 }
diff --git a/js/src/utils.ts b/js/src/utils.ts
index 61def4ab..8aadbcec 100644
--- a/js/src/utils.ts
+++ b/js/src/utils.ts
@@ -75,3 +75,15 @@ function copy_image_to_clipboard(data) {
     document.execCommand("Copy");
     document.body.removeChild(div);
 }
+
+export
+function materialToLightingModel(material) {
+    if (material.type === "MeshPhysicalMaterial") {
+        return "PHYSICAL";
+    } else if (material.type === "MeshLambertMaterial") {
+        return "LAMBERT";
+    } else if (material.type === "MeshPhongMaterial") {
+        return "PHONG";
+    }
+    return "DEFAULT";
+}
diff --git a/js/webpack.config.js b/js/webpack.config.js
index 8280fbae..8bf2c19a 100644
--- a/js/webpack.config.js
+++ b/js/webpack.config.js
@@ -33,7 +33,8 @@ module.exports = [
         output: {
             filename: 'extension.js',
             path: path.resolve(__dirname, `../${pyname}/static`),
-            libraryTarget: 'amd'
+            libraryTarget: 'amd',
+            devtoolModuleFilenameTemplate: 'webpack://ipyvolume/[namespace]/[resource-path]?[loaders]',
         },
         resolve: resolve
     },
@@ -48,7 +49,8 @@ module.exports = [
         output: {
             filename: 'index.js',
             path: path.resolve(__dirname, `../${pyname}/static`),
-            libraryTarget: 'amd'
+            libraryTarget: 'amd',
+            devtoolModuleFilenameTemplate: 'webpack://ipyvolume/[namespace]/[resource-path]?[loaders]',
         },
         module: {
             rules: rules
@@ -79,7 +81,8 @@ module.exports = [
             filename: 'index.js',
             path: path.resolve(__dirname, './dist/'),
             libraryTarget: 'amd',
-            publicPath: 'https://unpkg.com/ipyvolume@' + version + '/dist/'
+            publicPath: 'https://unpkg.com/ipyvolume@' + version + '/dist/',
+            devtoolModuleFilenameTemplate: 'webpack://ipyvolume/[namespace]/[resource-path]?[loaders]',
         },
         devtool: 'source-map',
         module: {

From 5c9f8aeca284de4cad216825e0a9e565c6ab19fb Mon Sep 17 00:00:00 2001
From: "Maarten A. Breddels" <maartenbreddels@gmail.com>
Date: Thu, 13 Aug 2020 21:05:18 +0200
Subject: [PATCH 02/10] add back cast/receive shadow

---
 ipyvolume/widgets.py | 3 +++
 js/src/mesh.ts       | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/ipyvolume/widgets.py b/ipyvolume/widgets.py
index 85ad4fb7..2926af2d 100644
--- a/ipyvolume/widgets.py
+++ b/ipyvolume/widgets.py
@@ -100,6 +100,9 @@ def _default_material(self):
     def _default_line_material(self):
         return pythreejs.ShaderMaterial()
 
+    cast_shadow = traitlets.CBool(default_value=True).tag(sync=True)
+    receive_shadow = traitlets.CBool(default_value=True).tag(sync=True)
+
 @widgets.register
 class Scatter(widgets.Widget):
     _view_name = Unicode('ScatterView').tag(sync=True)
diff --git a/js/src/mesh.ts b/js/src/mesh.ts
index ca8abeb1..780c5e60 100644
--- a/js/src/mesh.ts
+++ b/js/src/mesh.ts
@@ -110,7 +110,7 @@ class MeshView extends widgets.WidgetView {
         this.model.on("change:geo change:connected", this.update_, this);
         this.model.on("change:color_scale", this._update_color_scale, this);
         this.model.on("change:texture", this._load_textures, this);
-        this.model.on("change:visible change:lighting_model change:opacity change:material", this._update_materials, this);
+        this.model.on("change:visible change:lighting_model change:opacity change:material change:cast_shadow change:receive_shadow", this._update_materials, this);
     }
 
     public _load_textures() {

From 860a6c5c7a4a691f152539f6e31d03e6ca8a6510 Mon Sep 17 00:00:00 2001
From: "Maarten A. Breddels" <maartenbreddels@gmail.com>
Date: Thu, 13 Aug 2020 21:06:08 +0200
Subject: [PATCH 03/10] errors copy pasting shaders

---
 js/glsl/mesh-fragment.glsl    | 400 +++++++++++++++++++++-------------
 js/glsl/scatter-fragment.glsl | 209 +++++++++++++-----
 2 files changed, 393 insertions(+), 216 deletions(-)

diff --git a/js/glsl/mesh-fragment.glsl b/js/glsl/mesh-fragment.glsl
index 38d429c5..8a1eca28 100644
--- a/js/glsl/mesh-fragment.glsl
+++ b/js/glsl/mesh-fragment.glsl
@@ -1,5 +1,15 @@
 // mesh-fragment shader
 #if defined( AS_DEFAULT ) || defined( AS_COORDINATE )
+varying vec4 vertex_color;
+varying vec3 vertex_position;
+varying vec2 vertex_uv;
+
+#ifdef USE_TEXTURE
+    uniform sampler2D texture;
+    uniform sampler2D texture_previous;
+    uniform float animation_time_texture;
+#endif
+
     // taken similar to phong shading
     #include <common>
     #include <packing>
@@ -26,171 +36,80 @@
     #include <specularmap_pars_fragment>
     #include <logdepthbuf_pars_fragment>
     #include <clipping_planes_pars_fragment>
+    void main(void)
+    {
+        #ifdef AS_COORDINATE
+            // should we ignore shading for RGB pass?
+            gl_FragColor = vec4(vertex_color.rgb, 1.0);
+        #else
+            // 0 when in shadow, 1 if visible
+            float shadow_visibility = getShadowMask();
+            #ifdef IS_LINE
+                gl_FragColor = vec4(vertex_color.rgb * shadow_visibility, vertex_color.a);
+            #else
+                vec3 fdx = dFdx( vertex_position );
+                vec3 fdy = dFdy( vertex_position );
+                vec3 normal = normalize( cross( fdx, fdy ) );
+                float diffuse = dot( normal, vec3( 0.0, 0.0, 1.0 ) );
+
+                #ifdef USE_TEXTURE
+                    vec4 sample = mix(texture2D(texture_previous, vertex_uv), texture2D(texture, vertex_uv), animation_time_texture);
+                    gl_FragColor = vec4(clamp(diffuse, 0.2, 1.) * sample.rgb * shadow_visibility, 1.0);
+                #else
+                    gl_FragColor = vec4(clamp(diffuse, 0.2, 1.) * vertex_color.rgb * shadow_visibility, vertex_color.a);
+                #endif // USE_TEXTURE
+            #endif // IS_LINE
+        #endif // AS_COORDINATE
+    }
 #endif //defined( AS_DEFAULT ) || defined( AS_COORDINATE )
-#ifdef AS_LAMBERT
-    #define LAMBERT
-    uniform vec3 diffuse;
-    uniform vec3 emissive;
-    uniform float emissiveIntensity;
-    uniform float opacity;
-
-    varying vec3 vLightFront;
-
-    #ifdef DOUBLE_SIDED
-        varying vec3 vLightBack;
-    #endif
 
-    #include <common>
-    #include <packing>
-    #include <dithering_pars_fragment>
-    #include <color_pars_fragment>
-    #include <uv_pars_fragment>
-    #include <uv2_pars_fragment>
-    #include <map_pars_fragment>
-    #include <alphamap_pars_fragment>
-    #include <aomap_pars_fragment>
-    #include <lightmap_pars_fragment>
-    #include <emissivemap_pars_fragment>
-    #include <envmap_pars_fragment>
-    #include <bsdfs>
-    #include <lights_pars_begin>
-    #include <fog_pars_fragment>
-    #include <shadowmap_pars_fragment>
-    #include <shadowmask_pars_fragment>
-    #include <specularmap_pars_fragment>
-    #include <logdepthbuf_pars_fragment>
-    #include <clipping_planes_pars_fragment>
-#endif //AS_LAMBERT
-#ifdef AS_PHONG
-    #define PHONG
-
-    uniform vec3 diffuse;
-    uniform vec3 emissive;
-    uniform vec3 specular;
-
-    uniform float shininess;
-    uniform float opacity;
-    uniform float emissiveIntensity;
-
-    #include <common>
-    #include <packing>
-    #include <dithering_pars_fragment>
-    #include <color_pars_fragment>
-    #include <uv_pars_fragment>
-    #include <uv2_pars_fragment>
-    #include <map_pars_fragment>
-    #include <alphamap_pars_fragment>
-    #include <aomap_pars_fragment>
-    #include <lightmap_pars_fragment>
-    #include <emissivemap_pars_fragment>
-    #include <envmap_pars_fragment>
-    #include <gradientmap_pars_fragment>
-    #include <fog_pars_fragment>
-    #include <bsdfs>
-    #include <lights_pars_begin>
-    #include <lights_phong_pars_fragment>
-    #include <shadowmap_pars_fragment>
-    #include <bumpmap_pars_fragment>
-    #include <normalmap_pars_fragment>
-    #include <specularmap_pars_fragment>
-    #include <logdepthbuf_pars_fragment>
-    #include <clipping_planes_pars_fragment>
-#endif //AS_PHONG
-#ifdef AS_PHYSICAL
-    #define PHYSICAL
-    uniform vec3 diffuse;
-    uniform vec3 emissive;
-    uniform float roughness;
-    uniform float metalness;
-    uniform float opacity;
-    uniform float emissiveIntensity;
 
-    #ifndef STANDARD
-        uniform float clearCoat;
-        uniform float clearCoatRoughness;
-    #endif
 
-    varying vec3 vViewPosition;
+#ifdef AS_LAMBERT
+uniform vec3 diffuse;
+uniform vec3 emissive;
+uniform float opacity;
 
-    #ifndef FLAT_SHADED
-        varying vec3 vNormal;
-    #endif
+varying vec3 vLightFront;
 
-    #include <common>
-    #include <packing>
-    #include <dithering_pars_fragment>
-    #include <color_pars_fragment>
-    #include <uv_pars_fragment>
-    #include <uv2_pars_fragment>
-    #include <map_pars_fragment>
-    #include <alphamap_pars_fragment>
-    #include <aomap_pars_fragment>
-    #include <lightmap_pars_fragment>
-    #include <emissivemap_pars_fragment>
-    #include <bsdfs>
-    #include <cube_uv_reflection_fragment>
-    #include <envmap_pars_fragment>
-    #include <envmap_physical_pars_fragment>
-    #include <fog_pars_fragment>
-    #include <lights_pars_begin>
-    #include <lights_physical_pars_fragment>
-    #include <shadowmap_pars_fragment>
-    #include <bumpmap_pars_fragment>
-    #include <normalmap_pars_fragment>
-    #include <roughnessmap_pars_fragment>
-    #include <metalnessmap_pars_fragment>
-    #include <logdepthbuf_pars_fragment>
-    #include <clipping_planes_pars_fragment>
-#endif //AS_PHYSICAL
+#ifdef DOUBLE_SIDED
 
-varying vec4 vertex_color;
-varying vec3 vertex_position;
-varying vec2 vertex_uv;
+	varying vec3 vLightBack;
 
-#ifdef USE_TEXTURE
-    uniform sampler2D texture;
-    uniform sampler2D texture_previous;
-    uniform float animation_time_texture;
 #endif
 
+#include <common>
+#include <packing>
+#include <dithering_pars_fragment>
+#include <color_pars_fragment>
+#include <uv_pars_fragment>
+#include <uv2_pars_fragment>
+#include <map_pars_fragment>
+#include <alphamap_pars_fragment>
+#include <aomap_pars_fragment>
+#include <lightmap_pars_fragment>
+#include <emissivemap_pars_fragment>
+#include <envmap_pars_fragment>
+#include <bsdfs>
+#include <lights_pars_begin>
+#include <fog_pars_fragment>
+#include <shadowmap_pars_fragment>
+#include <shadowmask_pars_fragment>
+#include <specularmap_pars_fragment>
+#include <logdepthbuf_pars_fragment>
+#include <clipping_planes_pars_fragment>
+
+void main() {
 
-void main(void)
-{
-#if defined( AS_DEFAULT ) || defined( AS_COORDINATE )
-    #ifdef AS_COORDINATE
-        // should we ignore shading for RGB pass?
-        gl_FragColor = vec4(vertex_color.rgb, 1.0);
-    #else
-        // 0 when in shadow, 1 if visible
-        float shadow_visibility = getShadowMask();
-        #ifdef IS_LINE
-            gl_FragColor = vec4(vertex_color.rgb * shadow_visibility, vertex_color.a);
-        #else
-            vec3 fdx = dFdx( vertex_position );
-            vec3 fdy = dFdy( vertex_position );
-            vec3 normal = normalize( cross( fdx, fdy ) );
-            float diffuse = dot( normal, vec3( 0.0, 0.0, 1.0 ) );
-
-            #ifdef USE_TEXTURE
-                vec4 sample = mix(texture2D(texture_previous, vertex_uv), texture2D(texture, vertex_uv), animation_time_texture);
-                gl_FragColor = vec4(clamp(diffuse, 0.2, 1.) * sample.rgb * shadow_visibility, 1.0);
-            #else
-                gl_FragColor = vec4(clamp(diffuse, 0.2, 1.) * vertex_color.rgb * shadow_visibility, vertex_color.a);
-            #endif // USE_TEXTURE
-        #endif // IS_LINE
-    #endif // AS_COORDINATE
-#endif //defined( AS_DEFAULT ) || defined( AS_COORDINATE )
-
-#ifdef AS_LAMBERT
-    #include <clipping_planes_fragment>
+	#include <clipping_planes_fragment>
 
-	vec4 diffuseColor = vec4( vec3(1,1,1), opacity );
+	vec4 diffuseColor = vec4( diffuse, opacity );
 	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );
-	vec3 totalEmissiveRadiance = emissive * emissiveIntensity;
+	vec3 totalEmissiveRadiance = emissive;
 
 	#include <logdepthbuf_fragment>
 	#include <map_fragment>
-	//#include <color_fragment>
+	#include <color_fragment>
 	#include <alphamap_fragment>
 	#include <alphatest_fragment>
 	#include <specularmap_fragment>
@@ -204,9 +123,13 @@ void main(void)
 	reflectedLight.indirectDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb );
 
 	#ifdef DOUBLE_SIDED
+
 		reflectedLight.directDiffuse = ( gl_FrontFacing ) ? vLightFront : vLightBack;
+
 	#else
+
 		reflectedLight.directDiffuse = vLightFront;
+
 	#endif
 
 	reflectedLight.directDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb ) * getShadowMask();
@@ -226,24 +149,57 @@ void main(void)
 	#include <premultiplied_alpha_fragment>
 	#include <dithering_fragment>
 
+}
 #endif //AS_LAMBERT
-
 #ifdef AS_PHONG
-    #include <clipping_planes_fragment>
+#define PHONG
+
+uniform vec3 diffuse;
+uniform vec3 emissive;
+uniform vec3 specular;
+uniform float shininess;
+uniform float opacity;
+
+#include <common>
+#include <packing>
+#include <dithering_pars_fragment>
+#include <color_pars_fragment>
+#include <uv_pars_fragment>
+#include <uv2_pars_fragment>
+#include <map_pars_fragment>
+#include <alphamap_pars_fragment>
+#include <aomap_pars_fragment>
+#include <lightmap_pars_fragment>
+#include <emissivemap_pars_fragment>
+#include <envmap_pars_fragment>
+#include <gradientmap_pars_fragment>
+#include <fog_pars_fragment>
+#include <bsdfs>
+#include <lights_pars_begin>
+#include <lights_phong_pars_fragment>
+#include <shadowmap_pars_fragment>
+#include <bumpmap_pars_fragment>
+#include <normalmap_pars_fragment>
+#include <specularmap_pars_fragment>
+#include <logdepthbuf_pars_fragment>
+#include <clipping_planes_pars_fragment>
+
+void main() {
+
+	#include <clipping_planes_fragment>
 
-	vec4 diffuseColor = vec4( vec3(1,1,1), opacity );
+	vec4 diffuseColor = vec4( diffuse, opacity );
 	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );
-	vec3 totalEmissiveRadiance = emissive * emissiveIntensity;
+	vec3 totalEmissiveRadiance = emissive;
 
 	#include <logdepthbuf_fragment>
 	#include <map_fragment>
-	//#include <color_fragment>
+	#include <color_fragment>
 	#include <alphamap_fragment>
 	#include <alphatest_fragment>
 	#include <specularmap_fragment>
 	#include <normal_fragment_begin>
 	#include <normal_fragment_maps>
-	//normal = -normal;
 	#include <emissivemap_fragment>
 
 	// accumulation
@@ -266,23 +222,73 @@ void main(void)
 	#include <fog_fragment>
 	#include <premultiplied_alpha_fragment>
 	#include <dithering_fragment>
-#endif //AS_PHONG
 
+}
+#endif //AS_PHONG
 #ifdef AS_PHYSICAL
+    #define PHYSICAL
+    uniform vec3 diffuse;
+    uniform vec3 emissive;
+    uniform float roughness;
+    uniform float metalness;
+    uniform float opacity;
+    uniform float emissiveIntensity;
+
+    #ifndef STANDARD
+        uniform float clearCoat;
+        uniform float clearCoatRoughness;
+    #endif
+
+    varying vec3 vViewPosition;
+
+    #ifndef FLAT_SHADED
+        varying vec3 vNormal;
+    #endif
+
+    #include <common>
+    #include <packing>
+    #include <dithering_pars_fragment>
+    #include <color_pars_fragment>
+    #include <uv_pars_fragment>
+    #include <uv2_pars_fragment>
+    #include <map_pars_fragment>
+    #include <alphamap_pars_fragment>
+    #include <aomap_pars_fragment>
+    #include <lightmap_pars_fragment>
+    #include <emissivemap_pars_fragment>
+    #include <bsdfs>
+    #include <cube_uv_reflection_fragment>
+    #include <envmap_pars_fragment>
+    #include <envmap_physical_pars_fragment>
+    #include <fog_pars_fragment>
+    #include <lights_pars_begin>
+    #include <lights_physical_pars_fragment>
+    #include <shadowmap_pars_fragment>
+    #include <bumpmap_pars_fragment>
+    #include <normalmap_pars_fragment>
+    #include <roughnessmap_pars_fragment>
+    #include <metalnessmap_pars_fragment>
+    #include <logdepthbuf_pars_fragment>
+    #include <clipping_planes_pars_fragment>
+
+void main(void)
+{
 	#include <clipping_planes_fragment>
 
-	vec4 diffuseColor = vec4( vec3(1,1,1), opacity );
+	vec4 diffuseColor = vec4( 1.0, 1.0, 1.0, opacity );
 	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );
 	vec3 totalEmissiveRadiance = emissive * emissiveIntensity;
 
 	#include <logdepthbuf_fragment>
 	#include <map_fragment>
 	//#include <color_fragment>
+
 	#include <alphamap_fragment>
 	#include <alphatest_fragment>
 	#include <roughnessmap_fragment>
 	#include <metalnessmap_fragment>
 	#include <normal_fragment_begin>
+
 	#include <normal_fragment_maps>
 	#include <emissivemap_fragment>
 
@@ -303,5 +309,85 @@ void main(void)
 	#include <fog_fragment>
 	#include <premultiplied_alpha_fragment>
 	#include <dithering_fragment>
+
+}
 #endif //AS_PHYSICAL
+#ifdef AS_DISTANCE
+#define DISTANCE
+
+uniform vec3 referencePosition;
+uniform float nearDistance;
+uniform float farDistance;
+varying vec3 vWorldPosition;
+
+#include <common>
+#include <packing>
+#include <uv_pars_fragment>
+#include <map_pars_fragment>
+#include <alphamap_pars_fragment>
+#include <clipping_planes_pars_fragment>
+
+void main () {
+
+	#include <clipping_planes_fragment>
+
+	vec4 diffuseColor = vec4( 1.0 );
+
+	#include <map_fragment>
+	#include <alphamap_fragment>
+	#include <alphatest_fragment>
+
+	float dist = length( vWorldPosition - referencePosition );
+	dist = ( dist - nearDistance ) / ( farDistance - nearDistance );
+	dist = saturate( dist ); // clamp to [ 0, 1 ]
+
+	gl_FragColor = packDepthToRGBA( dist );
+
+}
+#endif//AS_DISTANCE
+
+#ifdef AS_DEPTH
+#if DEPTH_PACKING == 3200
+
+	uniform float opacity;
+
+#endif
+
+#include <common>
+#include <packing>
+#include <uv_pars_fragment>
+#include <map_pars_fragment>
+#include <alphamap_pars_fragment>
+#include <logdepthbuf_pars_fragment>
+#include <clipping_planes_pars_fragment>
+
+void main() {
+
+	#include <clipping_planes_fragment>
+
+	vec4 diffuseColor = vec4( 1.0 );
+
+	#if DEPTH_PACKING == 3200
+
+		diffuseColor.a = opacity;
+
+	#endif
+
+	#include <map_fragment>
+	#include <alphamap_fragment>
+	#include <alphatest_fragment>
+
+	#include <logdepthbuf_fragment>
+
+	#if DEPTH_PACKING == 3200
+
+		gl_FragColor = vec4( vec3( gl_FragCoord.z ), opacity );
+
+	#elif DEPTH_PACKING == 3201
+
+		gl_FragColor = packDepthToRGBA( gl_FragCoord.z );
+
+	#endif
+
 }
+#endif //AS_DEPTH
diff --git a/js/glsl/scatter-fragment.glsl b/js/glsl/scatter-fragment.glsl
index c049189d..9157a865 100644
--- a/js/glsl/scatter-fragment.glsl
+++ b/js/glsl/scatter-fragment.glsl
@@ -72,73 +72,164 @@ void main(void)
 #endif //defined( AS_DEFAULT ) || defined( AS_COORDINATE )
 
 #ifdef AS_LAMBERT
-    #define LAMBERT
-    uniform vec3 diffuse;
-    uniform vec3 emissive;
-    uniform float emissiveIntensity;
-    uniform float opacity;
+uniform vec3 diffuse;
+uniform vec3 emissive;
+uniform float opacity;
 
-    varying vec3 vLightFront;
+varying vec3 vLightFront;
 
-    #ifdef DOUBLE_SIDED
-        varying vec3 vLightBack;
-    #endif
+#ifdef DOUBLE_SIDED
 
-    #include <common>
-    #include <packing>
-    #include <dithering_pars_fragment>
-    #include <color_pars_fragment>
-    #include <uv_pars_fragment>
-    #include <uv2_pars_fragment>
-    #include <map_pars_fragment>
-    #include <alphamap_pars_fragment>
-    #include <aomap_pars_fragment>
-    #include <lightmap_pars_fragment>
-    #include <emissivemap_pars_fragment>
-    #include <envmap_pars_fragment>
-    #include <bsdfs>
-    #include <lights_pars_begin>
-    #include <fog_pars_fragment>
-    #include <shadowmap_pars_fragment>
-    #include <shadowmask_pars_fragment>
-    #include <specularmap_pars_fragment>
-    #include <logdepthbuf_pars_fragment>
-    #include <clipping_planes_pars_fragment>
+	varying vec3 vLightBack;
+
+#endif
+
+#include <common>
+#include <packing>
+#include <dithering_pars_fragment>
+#include <color_pars_fragment>
+#include <uv_pars_fragment>
+#include <uv2_pars_fragment>
+#include <map_pars_fragment>
+#include <alphamap_pars_fragment>
+#include <aomap_pars_fragment>
+#include <lightmap_pars_fragment>
+#include <emissivemap_pars_fragment>
+#include <envmap_pars_fragment>
+#include <bsdfs>
+#include <lights_pars_begin>
+#include <fog_pars_fragment>
+#include <shadowmap_pars_fragment>
+#include <shadowmask_pars_fragment>
+#include <specularmap_pars_fragment>
+#include <logdepthbuf_pars_fragment>
+#include <clipping_planes_pars_fragment>
+
+void main() {
+
+	#include <clipping_planes_fragment>
+
+	vec4 diffuseColor = vec4( diffuse, opacity );
+	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );
+	vec3 totalEmissiveRadiance = emissive;
+
+	#include <logdepthbuf_fragment>
+	#include <map_fragment>
+	#include <color_fragment>
+	#include <alphamap_fragment>
+	#include <alphatest_fragment>
+	#include <specularmap_fragment>
+	#include <emissivemap_fragment>
+
+	// accumulation
+	reflectedLight.indirectDiffuse = getAmbientLightIrradiance( ambientLightColor );
+
+	#include <lightmap_fragment>
+
+	reflectedLight.indirectDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb );
+
+	#ifdef DOUBLE_SIDED
+
+		reflectedLight.directDiffuse = ( gl_FrontFacing ) ? vLightFront : vLightBack;
+
+	#else
+
+		reflectedLight.directDiffuse = vLightFront;
+
+	#endif
+
+	reflectedLight.directDiffuse *= BRDF_Diffuse_Lambert( diffuseColor.rgb ) * getShadowMask();
+
+	// modulation
+	#include <aomap_fragment>
+
+	vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;
+
+	#include <envmap_fragment>
+
+	gl_FragColor = vec4( outgoingLight, diffuseColor.a );
+
+	#include <tonemapping_fragment>
+	#include <encodings_fragment>
+	#include <fog_fragment>
+	#include <premultiplied_alpha_fragment>
+	#include <dithering_fragment>
+
+}
 #endif //AS_LAMBERT
 #ifdef AS_PHONG
-    #define PHONG
+#define PHONG
 
-    uniform vec3 diffuse;
-    uniform vec3 emissive;
-    uniform vec3 specular;
+uniform vec3 diffuse;
+uniform vec3 emissive;
+uniform vec3 specular;
+uniform float shininess;
+uniform float opacity;
 
-    uniform float shininess;
-    uniform float opacity;
-    uniform float emissiveIntensity;
+#include <common>
+#include <packing>
+#include <dithering_pars_fragment>
+#include <color_pars_fragment>
+#include <uv_pars_fragment>
+#include <uv2_pars_fragment>
+#include <map_pars_fragment>
+#include <alphamap_pars_fragment>
+#include <aomap_pars_fragment>
+#include <lightmap_pars_fragment>
+#include <emissivemap_pars_fragment>
+#include <envmap_pars_fragment>
+#include <gradientmap_pars_fragment>
+#include <fog_pars_fragment>
+#include <bsdfs>
+#include <lights_pars_begin>
+#include <lights_phong_pars_fragment>
+#include <shadowmap_pars_fragment>
+#include <bumpmap_pars_fragment>
+#include <normalmap_pars_fragment>
+#include <specularmap_pars_fragment>
+#include <logdepthbuf_pars_fragment>
+#include <clipping_planes_pars_fragment>
 
-    #include <common>
-    #include <packing>
-    #include <dithering_pars_fragment>
-    #include <color_pars_fragment>
-    #include <uv_pars_fragment>
-    #include <uv2_pars_fragment>
-    #include <map_pars_fragment>
-    #include <alphamap_pars_fragment>
-    #include <aomap_pars_fragment>
-    #include <lightmap_pars_fragment>
-    #include <emissivemap_pars_fragment>
-    #include <envmap_pars_fragment>
-    #include <gradientmap_pars_fragment>
-    #include <fog_pars_fragment>
-    #include <bsdfs>
-    #include <lights_pars_begin>
-    #include <lights_phong_pars_fragment>
-    #include <shadowmap_pars_fragment>
-    #include <bumpmap_pars_fragment>
-    #include <normalmap_pars_fragment>
-    #include <specularmap_pars_fragment>
-    #include <logdepthbuf_pars_fragment>
-    #include <clipping_planes_pars_fragment>
+void main() {
+
+	#include <clipping_planes_fragment>
+
+	vec4 diffuseColor = vec4( diffuse, opacity );
+	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );
+	vec3 totalEmissiveRadiance = emissive;
+
+	#include <logdepthbuf_fragment>
+	#include <map_fragment>
+	#include <color_fragment>
+	#include <alphamap_fragment>
+	#include <alphatest_fragment>
+	#include <specularmap_fragment>
+	#include <normal_fragment_begin>
+	#include <normal_fragment_maps>
+	#include <emissivemap_fragment>
+
+	// accumulation
+	#include <lights_phong_fragment>
+	#include <lights_fragment_begin>
+	#include <lights_fragment_maps>
+	#include <lights_fragment_end>
+
+	// modulation
+	#include <aomap_fragment>
+
+	vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;
+
+	#include <envmap_fragment>
+
+	gl_FragColor = vec4( outgoingLight, diffuseColor.a );
+
+	#include <tonemapping_fragment>
+	#include <encodings_fragment>
+	#include <fog_fragment>
+	#include <premultiplied_alpha_fragment>
+	#include <dithering_fragment>
+
+}
 #endif //AS_PHONG
 #ifdef AS_PHYSICAL
     #define PHYSICAL

From bbf0e8c89d35b49b73a0822b3e5c72dfbce2911e Mon Sep 17 00:00:00 2001
From: "Maarten A. Breddels" <maartenbreddels@gmail.com>
Date: Fri, 14 Aug 2020 09:17:25 +0200
Subject: [PATCH 04/10] use color

---
 js/glsl/mesh-fragment.glsl    |  2 +-
 js/glsl/mesh-vertex.glsl      | 28 ++++++++++++++++------------
 js/glsl/scatter-fragment.glsl | 10 +++++-----
 js/glsl/scatter-vertex.glsl   |  5 +++--
 4 files changed, 25 insertions(+), 20 deletions(-)

diff --git a/js/glsl/mesh-fragment.glsl b/js/glsl/mesh-fragment.glsl
index 8a1eca28..d1906529 100644
--- a/js/glsl/mesh-fragment.glsl
+++ b/js/glsl/mesh-fragment.glsl
@@ -281,7 +281,7 @@ void main(void)
 
 	#include <logdepthbuf_fragment>
 	#include <map_fragment>
-	//#include <color_fragment>
+	#include <color_fragment>
 
 	#include <alphamap_fragment>
 	#include <alphatest_fragment>
diff --git a/js/glsl/mesh-vertex.glsl b/js/glsl/mesh-vertex.glsl
index df01bfda..daa8daa4 100644
--- a/js/glsl/mesh-vertex.glsl
+++ b/js/glsl/mesh-vertex.glsl
@@ -246,6 +246,18 @@ void main(void) {
     // vec3 positionEye = ( modelViewMatrix * vec4(model_pos, 1.0 ) ).xyz;
     // vertex_position = positionEye;
 
+    #ifdef AS_COORDINATE
+        // vertex_color = vec4(model_pos + vec3(0.5, 0.5, 0.5), 1.0);
+    #else
+        #ifdef USE_COLORMAP
+            float color_animated = mix(color_previous, color_current, animation_time_color);
+            float color_index = scale_transform_linear(color_animated, vec2(0.0, 1.0), domain_color);
+            vertex_color = texture2D(colormap, vec2(color_index, 0));
+        #else
+            vertex_color = mix(color_previous, color_current, animation_time_color);
+        #endif
+    #endif
+
 
 #if defined( AS_DEFAULT ) || defined( AS_COORDINATE )
     // vec3 model_pos = vec3(SCALE_X(animated_position.x), SCALE_Y(animated_position.y), SCALE_Z(animated_position.z));
@@ -260,6 +272,10 @@ void main(void) {
     vertex_uv = vec2(mix(u_previous, u, animation_time_u), mix(v_previous, v, animation_time_v));
 #endif
 
+    #if defined(USE_COLOR) && !(defined(AS_DEPTH) || defined(AS_DISTANCE))
+        vColor = vertex_color.rgb;
+    #endif
+
 
 #if defined( AS_DEFAULT ) || defined( AS_COORDINATE )
 	#include <morphtarget_vertex>
@@ -336,16 +352,4 @@ void main(void) {
 	#include <logdepthbuf_vertex>
 	#include <clipping_planes_vertex>
 #endif //AS_DEPTH
-
-#ifdef AS_COORDINATE
-    // vertex_color = vec4(model_pos + vec3(0.5, 0.5, 0.5), 1.0);
-#else
-    #ifdef USE_COLORMAP
-        float color_animated = mix(color_previous, color_current, animation_time_color);
-        float color_index = scale_transform_linear(color_animated, vec2(0.0, 1.0), domain_color);
-        vertex_color = texture2D(colormap, vec2(color_index, 0));
-    #else
-        vertex_color = mix(color_previous, color_current, animation_time_color);
-    #endif
-#endif
 }
diff --git a/js/glsl/scatter-fragment.glsl b/js/glsl/scatter-fragment.glsl
index 9157a865..93ddafa6 100644
--- a/js/glsl/scatter-fragment.glsl
+++ b/js/glsl/scatter-fragment.glsl
@@ -1,10 +1,10 @@
 // scatter-fragment shader
+varying vec4 vertex_color;
+varying vec3 vertex_position;
+varying vec2 vertex_uv;
+
 #if defined( AS_DEFAULT ) || defined( AS_COORDINATE )
     // extra only used for the default shading
-    varying vec4 vertex_color;
-    // varying vec4 vColor;
-    varying vec3 vertex_position;
-    varying vec2 vertex_uv;
 
     #ifdef USE_TEXTURE
         uniform sampler2D texture;
@@ -287,7 +287,7 @@ void main(void)
 
 	#include <logdepthbuf_fragment>
 	#include <map_fragment>
-	//#include <color_fragment>
+	#include <color_fragment>
 
 	#include <alphamap_fragment>
 	#include <alphatest_fragment>
diff --git a/js/glsl/scatter-vertex.glsl b/js/glsl/scatter-vertex.glsl
index 3175ea79..27e55ea8 100644
--- a/js/glsl/scatter-vertex.glsl
+++ b/js/glsl/scatter-vertex.glsl
@@ -329,10 +329,12 @@ void main(void) {
         vertex_color = mix(color_previous, color_next, animation_time_color);
     #endif
 #endif
+    #if defined(USE_COLOR) && !(defined(AS_DEPTH) || defined(AS_DISTANCE))
+        vColor = vertex_color.rgb;
+    #endif
 
 
 #if defined( AS_DEFAULT ) || defined( AS_COORDINATE )
-    vColor = vertex_color.rgb;
 	#include <morphtarget_vertex>
 	#include <skinning_vertex>
 	#include <displacementmap_vertex>
@@ -378,7 +380,6 @@ void main(void) {
 	#include <fog_vertex>
 #endif //AS_PHONG
 #ifdef AS_PHYSICAL
-    vColor = vertex_color.rgb;
 	#include <morphtarget_vertex>
 	#include <skinning_vertex>
 	#include <displacementmap_vertex>

From e27618de852658260e4146df7591b0d37b8f85c2 Mon Sep 17 00:00:00 2001
From: "Maarten A. Breddels" <maartenbreddels@gmail.com>
Date: Fri, 14 Aug 2020 11:18:32 +0200
Subject: [PATCH 05/10] shadow support for default material

---
 js/src/mesh.ts    | 2 ++
 js/src/scatter.ts | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/js/src/mesh.ts b/js/src/mesh.ts
index 780c5e60..4fcc5ce4 100644
--- a/js/src/mesh.ts
+++ b/js/src/mesh.ts
@@ -66,6 +66,7 @@ class MeshView extends widgets.WidgetView {
                 texture: { type: "t", value: null },
                 texture_previous: { type: "t", value: null },
                 colormap: {type: "t", value: null},
+                ...THREE.UniformsUtils.merge([THREE.UniformsLib["common"], THREE.UniformsLib["lights"]])
             };
 
         const get_material = (name)  => {
@@ -376,6 +377,7 @@ class MeshView extends widgets.WidgetView {
                 patchShader(shader);
             };
             material.needsUpdate = true;
+            material.lights = true;
         });
 
         this.update_shadow();
diff --git a/js/src/scatter.ts b/js/src/scatter.ts
index d6b72342..4a049652 100644
--- a/js/src/scatter.ts
+++ b/js/src/scatter.ts
@@ -122,6 +122,7 @@ class ScatterView extends widgets.WidgetView {
                 texture: { type: "t", value: null },
                 texture_previous: { type: "t", value: null },
                 colormap: {type: "t", value: null},
+                ...THREE.UniformsUtils.merge([THREE.UniformsLib["common"], THREE.UniformsLib["lights"]])
             };
         const get_material = (name)  => {
             if (this.model.get(name)) {
@@ -450,6 +451,7 @@ class ScatterView extends widgets.WidgetView {
                 patchShader(shader);
             };
             material.needsUpdate = true;
+            material.lights = true;
         });
 
         const geo = this.model.get("geo");

From 4f08f11b66a93ac611b6648eb10475791d10a825 Mon Sep 17 00:00:00 2001
From: "Maarten A. Breddels" <maartenbreddels@gmail.com>
Date: Fri, 14 Aug 2020 11:18:55 +0200
Subject: [PATCH 06/10] not passing invalid parameters to distance material

---
 js/src/mesh.ts    | 5 +----
 js/src/scatter.ts | 5 +----
 2 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/js/src/mesh.ts b/js/src/mesh.ts
index 4fcc5ce4..29609e12 100644
--- a/js/src/mesh.ts
+++ b/js/src/mesh.ts
@@ -543,10 +543,7 @@ class MeshView extends widgets.WidgetView {
                 // unset lighting model
                 delete defines[`AS_${this.lighting_model}`];
                 return {AS_DISTANCE: true, ...defines};
-            }, this.uniforms, vertexShader, fragmentShader, {
-                depthPacking: THREE.RGBADepthPacking,
-                alphaTest: 0.5,
-            });
+            }, this.uniforms, vertexShader, fragmentShader,  {});
             // BUG? because of our custom shader threejs thinks our object if out
             // of the frustum
             this.surface_mesh.frustumCulled = false;
diff --git a/js/src/scatter.ts b/js/src/scatter.ts
index 4a049652..24fe7cb8 100644
--- a/js/src/scatter.ts
+++ b/js/src/scatter.ts
@@ -578,10 +578,7 @@ class ScatterView extends widgets.WidgetView {
                 defines.AS_SPRITE = true;
             }
             return {AS_DISTANCE: true, ...defines};
-        }, this.uniforms, vertexShader, fragmentShader, {
-            depthPacking: THREE.RGBADepthPacking,
-            alphaTest: 0.5,
-        });
+        }, this.uniforms, vertexShader, fragmentShader, {});
         this.mesh.material_rgb = this.material_rgb;
         this.mesh.material_normal = this.material;
 

From 0f0b91a240e946926780f385abd3a121d706bec2 Mon Sep 17 00:00:00 2001
From: "Maarten A. Breddels" <maartenbreddels@gmail.com>
Date: Fri, 14 Aug 2020 11:41:06 +0200
Subject: [PATCH 07/10] get point light to work

---
 ipyvolume/pylab.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ipyvolume/pylab.py b/ipyvolume/pylab.py
index 3350fd14..22fa2b3a 100644
--- a/ipyvolume/pylab.py
+++ b/ipyvolume/pylab.py
@@ -1779,8 +1779,8 @@ def light_point(
     :param cast_shadow: Property of a Point Light to cast shadows. Default False
     :return: :any:`PointLight`
     """
-    near=0.5
-    far=5000
+    near=0.1
+    far=100
     fov=90
     aspect=1
     distance=0

From c3d62c7b90a3380740546c0d476aea716222a855 Mon Sep 17 00:00:00 2001
From: "Maarten A. Breddels" <maartenbreddels@gmail.com>
Date: Fri, 14 Aug 2020 13:03:25 +0200
Subject: [PATCH 08/10] Add missing file

---
 js/src/materials.ts | 50 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 js/src/materials.ts

diff --git a/js/src/materials.ts b/js/src/materials.ts
new file mode 100644
index 00000000..22272c86
--- /dev/null
+++ b/js/src/materials.ts
@@ -0,0 +1,50 @@
+
+import * as THREE from "three";
+import { patchShader } from "./scales";
+
+export
+class MeshDepthMaterialCustom extends (THREE as any).MeshDepthMaterial {
+    constructor(defines, uniforms, vertexShader, fragmentShader, parameters) {
+        super(parameters);
+        this.defines = defines;
+        this.uniforms = uniforms;
+        this.onBeforeCompile = (shader) => {
+            // const defines = this.defines();
+            const defines = {DEPTH_PACKING:3201, ...this.defines()};
+            let define_code = "";
+            for (const key of Object.keys(defines)) {
+                if (defines[key]) {
+                    define_code += `#define ${key} ${defines[key]}\n`;
+                }
+            }
+            shader.vertexShader = define_code + vertexShader;
+            shader.fragmentShader = define_code + fragmentShader;
+            // shallow copy the uniforms, so we share them (e.g. updating time)
+            shader.uniforms = {...shader.uniforms, ...this.uniforms};
+            patchShader(shader);
+        };
+    }
+}
+
+export
+class MeshDistanceMaterialCustom extends (THREE as any).MeshDistanceMaterial {
+    constructor(defines, uniforms, vertexShader, fragmentShader, parameters) {
+        super(parameters);
+        this.defines = defines;
+        this.uniforms = uniforms;
+        this.onBeforeCompile = (shader) => {
+            const defines = this.defines();
+            let define_code = "";
+            for (const key of Object.keys(defines)) {
+                if (defines[key]) {
+                    define_code += `#define ${key} ${defines[key]}\n`;
+                }
+            }
+            shader.vertexShader = define_code + vertexShader;
+            shader.fragmentShader = define_code + fragmentShader;
+            // shallow copy the uniforms, so we share them (e.g. updating time)
+            shader.uniforms = {...shader.uniforms, ...this.uniforms};
+            patchShader(shader);
+        };
+    }
+}

From 1724aa5f87408849b53b704d7b39bc2e8c817235 Mon Sep 17 00:00:00 2001
From: "Maarten A. Breddels" <maartenbreddels@gmail.com>
Date: Fri, 14 Aug 2020 15:24:06 +0200
Subject: [PATCH 09/10] fix js build

---
 js/package-lock.json | 11676 +++++++++++++++++++++++++++++++++++++++++
 js/package.json      |     2 +-
 js/src/labplugin.ts  |     2 +-
 3 files changed, 11678 insertions(+), 2 deletions(-)
 create mode 100644 js/package-lock.json

diff --git a/js/package-lock.json b/js/package-lock.json
new file mode 100644
index 00000000..9ff0d309
--- /dev/null
+++ b/js/package-lock.json
@@ -0,0 +1,11676 @@
+{
+  "name": "ipyvolume",
+  "version": "0.6.0-alpha.4",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@babel/code-frame": {
+      "version": "7.5.5",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.5.5.tgz",
+      "integrity": "sha512-27d4lZoomVyo51VegxI20xZPuSHusqbQag/ztrBC7wegWoQ1nLREPVSKSW8byhTlzTKyNE4ifaTA6lCp7JjpFw==",
+      "requires": {
+        "@babel/highlight": "^7.0.0"
+      }
+    },
+    "@babel/highlight": {
+      "version": "7.5.0",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.5.0.tgz",
+      "integrity": "sha512-7dV4eu9gBxoM0dAnj/BCFDW9LFU0zvTrkq0ugM7pnHEgguOEeOz1so2ZghEdzviYzQEED0r4EAgpsBChKy1TRQ==",
+      "requires": {
+        "chalk": "^2.0.0",
+        "esutils": "^2.0.2",
+        "js-tokens": "^4.0.0"
+      },
+      "dependencies": {
+        "ansi-styles": {
+          "version": "3.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+          "requires": {
+            "color-convert": "^1.9.0"
+          }
+        },
+        "chalk": {
+          "version": "2.4.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+          "requires": {
+            "ansi-styles": "^3.2.1",
+            "escape-string-regexp": "^1.0.5",
+            "supports-color": "^5.3.0"
+          }
+        },
+        "has-flag": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+          "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0="
+        },
+        "js-tokens": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
+          "integrity": "sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ=="
+        },
+        "supports-color": {
+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+          "requires": {
+            "has-flag": "^3.0.0"
+          }
+        }
+      }
+    },
+    "@babel/runtime": {
+      "version": "7.10.2",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.10.2.tgz",
+      "integrity": "sha512-6sF3uQw2ivImfVIl62RZ7MXhO2tap69WeWK57vAaimT6AZbE4FbqjdEJIN1UqoD6wI6B+1n9UiagafH1sxjOtg==",
+      "requires": {
+        "regenerator-runtime": "^0.13.4"
+      },
+      "dependencies": {
+        "regenerator-runtime": {
+          "version": "0.13.5",
+          "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.13.5.tgz",
+          "integrity": "sha512-ZS5w8CpKFinUzOwW3c83oPeVXoNsrLsaCoLtJvAClH135j/R77RuymhiSErhm2lKcwSCIpmvIWSbDkIfAqKQlA=="
+        }
+      }
+    },
+    "@blueprintjs/core": {
+      "version": "3.28.1",
+      "resolved": "https://registry.npmjs.org/@blueprintjs/core/-/core-3.28.1.tgz",
+      "integrity": "sha512-Ws4+FrtHh5U4TMaqhFW1PXajJobn2By72LOxu18q8ksY4CuyUzvo8xIOooViQdA7ZLx9pwhC6dytsYdykwRy0w==",
+      "requires": {
+        "@blueprintjs/icons": "^3.18.0",
+        "@types/dom4": "^2.0.1",
+        "classnames": "^2.2",
+        "dom4": "^2.1.5",
+        "normalize.css": "^8.0.1",
+        "popper.js": "^1.15.0",
+        "react-lifecycles-compat": "^3.0.4",
+        "react-popper": "^1.3.7",
+        "react-transition-group": "^2.9.0",
+        "resize-observer-polyfill": "^1.5.1",
+        "tslib": "~1.10.0"
+      }
+    },
+    "@blueprintjs/icons": {
+      "version": "3.18.0",
+      "resolved": "https://registry.npmjs.org/@blueprintjs/icons/-/icons-3.18.0.tgz",
+      "integrity": "sha512-emvW6AHWcilE3QoYnTs0eCkAZvpn13liTLnfajMfMVPB2/KKeYDa+TVbEqhVXWhrPanXkvJlZCVcizQvFeEYxw==",
+      "requires": {
+        "classnames": "^2.2",
+        "tslib": "~1.10.0"
+      }
+    },
+    "@blueprintjs/select": {
+      "version": "3.13.2",
+      "resolved": "https://registry.npmjs.org/@blueprintjs/select/-/select-3.13.2.tgz",
+      "integrity": "sha512-cx/pUqAbbGJpBQgmdc9Cwj8CKbDbgq6dxcG5qTXs3nXNZQRO5KtwaKSJEzSxO9PhmxxpEn6FrScukoevqHwHvw==",
+      "requires": {
+        "@blueprintjs/core": "^3.28.1",
+        "classnames": "^2.2",
+        "tslib": "~1.10.0"
+      }
+    },
+    "@fortawesome/fontawesome-free": {
+      "version": "5.13.0",
+      "resolved": "https://registry.npmjs.org/@fortawesome/fontawesome-free/-/fontawesome-free-5.13.0.tgz",
+      "integrity": "sha512-xKOeQEl5O47GPZYIMToj6uuA2syyFlq9EMSl2ui0uytjY9xbe8XS0pexNWmxrdcCyNGyDmLyYw5FtKsalBUeOg=="
+    },
+    "@jupyter-widgets/base": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/@jupyter-widgets/base/-/base-2.0.2.tgz",
+      "integrity": "sha512-nNpD+RGJ0As74XxDSGMeObfXSZ8XPBFHJ1AyugzYxpmxIigB2n3DxTyonASkR/3hXwxl3/nXBxHGlxQGs/+nOA==",
+      "requires": {
+        "@jupyterlab/services": "^4.0.0",
+        "@phosphor/coreutils": "^1.2.0",
+        "@phosphor/messaging": "^1.2.1",
+        "@phosphor/widgets": "^1.3.0",
+        "@types/backbone": "^1.4.1",
+        "@types/lodash": "^4.14.134",
+        "backbone": "1.2.3",
+        "base64-js": "^1.2.1",
+        "jquery": "^3.1.1",
+        "lodash": "^4.17.4"
+      }
+    },
+    "@jupyter-widgets/controls": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/@jupyter-widgets/controls/-/controls-2.0.0.tgz",
+      "integrity": "sha512-g0SRSXJ/P5yM23scZl+8zXR1Jz783Uf7H5tq6ucTibMk8mXxDIXn09Rgal4K17XH2LSesd0dkhTzMmlLPMAH7g==",
+      "requires": {
+        "@jupyter-widgets/base": "^3.0.0",
+        "@lumino/algorithm": "^1.1.0",
+        "@lumino/domutils": "^1.1.0",
+        "@lumino/messaging": "^1.2.1",
+        "@lumino/signaling": "^1.2.0",
+        "@lumino/widgets": "^1.3.0",
+        "d3-format": "^1.3.0",
+        "jquery": "^3.1.1",
+        "jquery-ui": "^1.12.1",
+        "underscore": "^1.8.3"
+      },
+      "dependencies": {
+        "@jupyter-widgets/base": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/@jupyter-widgets/base/-/base-3.0.0.tgz",
+          "integrity": "sha512-un1ZTHALCwE/SAYk2gEaonYM1JoaFyhosN8a3y2bhl4N26yCB3dP1PqGHLsAFur6ZB7fwuWwBEkIZx+nOwstAQ==",
+          "requires": {
+            "@jupyterlab/services": "^5.0.0",
+            "@lumino/coreutils": "^1.2.0",
+            "@lumino/messaging": "^1.2.1",
+            "@lumino/widgets": "^1.3.0",
+            "@types/backbone": "^1.4.1",
+            "@types/lodash": "^4.14.134",
+            "backbone": "1.2.3",
+            "base64-js": "^1.2.1",
+            "jquery": "^3.1.1",
+            "lodash": "^4.17.4"
+          }
+        },
+        "@jupyterlab/coreutils": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/@jupyterlab/coreutils/-/coreutils-4.1.0.tgz",
+          "integrity": "sha512-2lcXHd8ZCUuqoiZYK9Xs4HHX46jkdtsdmfgvgg/3odFXFMdv4Twau7fqr9URgRl5JYszPPpItGJIorAVipVfNQ==",
+          "requires": {
+            "@lumino/coreutils": "^1.4.2",
+            "@lumino/disposable": "^1.3.5",
+            "@lumino/signaling": "^1.3.5",
+            "minimist": "~1.2.0",
+            "moment": "^2.24.0",
+            "path-posix": "~1.0.0",
+            "url-parse": "~1.4.7"
+          }
+        },
+        "@jupyterlab/observables": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/@jupyterlab/observables/-/observables-3.1.0.tgz",
+          "integrity": "sha512-4Dx6o5BzHVdWFFUPTAaeUkGngJfy5Qm0N37lbh/2NcWz1NZuuC6SrgREW3zcLSKwxdwkMAXo6En0T1UyrCFjTA==",
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+            "@lumino/algorithm": "^1.2.3",
+            "@lumino/coreutils": "^1.4.2",
+            "@lumino/disposable": "^1.3.5",
+            "@lumino/messaging": "^1.3.3",
+            "@lumino/signaling": "^1.3.5"
+          }
+        },
+        "@jupyterlab/services": {
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/@jupyterlab/services/-/services-5.1.0.tgz",
+          "integrity": "sha512-xhtDvAdgw+sWNSbpkExCYyJbHxlwhiZYqc07+zhOdYrpxO19k/ZmmyNoYCyfvNLcMQ4JWVBoczI714u1QNLj4w==",
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+            "@jupyterlab/coreutils": "^4.1.0",
+            "@jupyterlab/nbformat": "^2.1.0",
+            "@jupyterlab/observables": "^3.1.0",
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+            "@lumino/algorithm": "^1.2.3",
+            "@lumino/coreutils": "^1.4.2",
+            "@lumino/disposable": "^1.3.5",
+            "@lumino/polling": "^1.1.1",
+            "@lumino/signaling": "^1.3.5",
+            "node-fetch": "^2.6.0",
+            "ws": "^7.2.0"
+          }
+        }
+      }
+    },
+    "@jupyterlab/application": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/@jupyterlab/application/-/application-2.1.2.tgz",
+      "integrity": "sha512-b32BZGAt+LZWdzEN/c6RbmMxpbRxAIPrrl1HvopykWMdxMkFK9Y2g/qptg9Q2Lfo/t9WA/+i4NDOTUXFDB/9oQ==",
+      "requires": {
+        "@fortawesome/fontawesome-free": "^5.12.0",
+        "@jupyterlab/apputils": "^2.1.1",
+        "@jupyterlab/coreutils": "^4.1.0",
+        "@jupyterlab/docregistry": "^2.1.2",
+        "@jupyterlab/rendermime": "^2.1.1",
+        "@jupyterlab/rendermime-interfaces": "^2.1.0",
+        "@jupyterlab/services": "^5.1.0",
+        "@jupyterlab/statedb": "^2.1.0",
+        "@jupyterlab/ui-components": "^2.1.1",
+        "@lumino/algorithm": "^1.2.3",
+        "@lumino/application": "^1.8.4",
+        "@lumino/commands": "^1.10.1",
+        "@lumino/coreutils": "^1.4.2",
+        "@lumino/disposable": "^1.3.5",
+        "@lumino/messaging": "^1.3.3",
+        "@lumino/polling": "^1.1.1",
+        "@lumino/properties": "^1.1.6",
+        "@lumino/signaling": "^1.3.5",
+        "@lumino/widgets": "^1.11.1"
+      },
+      "dependencies": {
+        "@jupyterlab/coreutils": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/@jupyterlab/coreutils/-/coreutils-4.1.0.tgz",
+          "integrity": "sha512-2lcXHd8ZCUuqoiZYK9Xs4HHX46jkdtsdmfgvgg/3odFXFMdv4Twau7fqr9URgRl5JYszPPpItGJIorAVipVfNQ==",
+          "requires": {
+            "@lumino/coreutils": "^1.4.2",
+            "@lumino/disposable": "^1.3.5",
+            "@lumino/signaling": "^1.3.5",
+            "minimist": "~1.2.0",
+            "moment": "^2.24.0",
+            "path-posix": "~1.0.0",
+            "url-parse": "~1.4.7"
+          }
+        },
+        "@jupyterlab/observables": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/@jupyterlab/observables/-/observables-3.1.0.tgz",
+          "integrity": "sha512-4Dx6o5BzHVdWFFUPTAaeUkGngJfy5Qm0N37lbh/2NcWz1NZuuC6SrgREW3zcLSKwxdwkMAXo6En0T1UyrCFjTA==",
+          "requires": {
+            "@lumino/algorithm": "^1.2.3",
+            "@lumino/coreutils": "^1.4.2",
+            "@lumino/disposable": "^1.3.5",
+            "@lumino/messaging": "^1.3.3",
+            "@lumino/signaling": "^1.3.5"
+          }
+        },
+        "@jupyterlab/services": {
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/@jupyterlab/services/-/services-5.1.0.tgz",
+          "integrity": "sha512-xhtDvAdgw+sWNSbpkExCYyJbHxlwhiZYqc07+zhOdYrpxO19k/ZmmyNoYCyfvNLcMQ4JWVBoczI714u1QNLj4w==",
+          "requires": {
+            "@jupyterlab/coreutils": "^4.1.0",
+            "@jupyterlab/nbformat": "^2.1.0",
+            "@jupyterlab/observables": "^3.1.0",
+            "@jupyterlab/settingregistry": "^2.1.0",
+            "@jupyterlab/statedb": "^2.1.0",
+            "@lumino/algorithm": "^1.2.3",
+            "@lumino/coreutils": "^1.4.2",
+            "@lumino/disposable": "^1.3.5",
+            "@lumino/polling": "^1.1.1",
+            "@lumino/signaling": "^1.3.5",
+            "node-fetch": "^2.6.0",
+            "ws": "^7.2.0"
+          }
+        }
+      }
+    },
+    "@jupyterlab/apputils": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/@jupyterlab/apputils/-/apputils-2.1.1.tgz",
+      "integrity": "sha512-orGzvW2S1k/FjW42dhygq8XJZbQRBTsNXXKFWsqewSn9sNTd3irKjDEwS3Ilce1w+LsS/t3H03xCnsOYPu8LSQ==",
+      "requires": {
+        "@jupyterlab/coreutils": "^4.1.0",
+        "@jupyterlab/services": "^5.1.0",
+        "@jupyterlab/settingregistry": "^2.1.0",
+        "@jupyterlab/statedb": "^2.1.0",
+        "@jupyterlab/ui-components": "^2.1.1",
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+      "dev": true,
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+        "decamelize": "^1.2.0"
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+      "resolved": "https://registry.npmjs.org/yeast/-/yeast-0.1.2.tgz",
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+}
diff --git a/js/package.json b/js/package.json
index b4c53baf..bdc3584b 100644
--- a/js/package.json
+++ b/js/package.json
@@ -63,7 +63,7 @@
     "webpack-cli": "^3.2.3"
   },
   "dependencies": {
-    "@jupyter-widgets/base": "^1 || ^2 || ^3 || ^4",
+    "@jupyter-widgets/base": "^1 || ^2.0.2 || ^3 || ^4",
     "@jupyter-widgets/controls": "^1 || ^2",
     "@jupyterlab/application": "^2.1.0",
     "css-loader": "^0.28.4",
diff --git a/js/src/labplugin.ts b/js/src/labplugin.ts
index d87dbfd0..706df309 100644
--- a/js/src/labplugin.ts
+++ b/js/src/labplugin.ts
@@ -5,7 +5,7 @@ import {JupyterFrontEnd, JupyterFrontEndPlugin} from '@jupyterlab/application';
 
 const plugin: JupyterFrontEndPlugin<void> = {
   id: "ipyvolume",
-  requires: [base.IJupyterWidgetRegistry],
+  requires: [base.IJupyterWidgetRegistry as any],
   activate(app: JupyterFrontEnd, widgets: base.IJupyterWidgetRegistry) {
       widgets.registerWidget({
           name: "ipyvolume",

From 01657ce937236ad0dae69e7c33ce426bde1ce9a2 Mon Sep 17 00:00:00 2001
From: "Maarten A. Breddels" <maartenbreddels@gmail.com>
Date: Fri, 14 Aug 2020 15:24:17 +0200
Subject: [PATCH 10/10] nicer webpack path

---
 js/webpack.config.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/js/webpack.config.js b/js/webpack.config.js
index 8bf2c19a..f91614e6 100644
--- a/js/webpack.config.js
+++ b/js/webpack.config.js
@@ -34,7 +34,7 @@ module.exports = [
             filename: 'extension.js',
             path: path.resolve(__dirname, `../${pyname}/static`),
             libraryTarget: 'amd',
-            devtoolModuleFilenameTemplate: 'webpack://ipyvolume/[namespace]/[resource-path]?[loaders]',
+            devtoolModuleFilenameTemplate: 'webpack://jupyter-widgets/ipyvolume/[resource-path]?[loaders]',
         },
         resolve: resolve
     },
@@ -50,7 +50,7 @@ module.exports = [
             filename: 'index.js',
             path: path.resolve(__dirname, `../${pyname}/static`),
             libraryTarget: 'amd',
-            devtoolModuleFilenameTemplate: 'webpack://ipyvolume/[namespace]/[resource-path]?[loaders]',
+            devtoolModuleFilenameTemplate: 'webpack://jupyter-widgets/ipyvolume/[resource-path]?[loaders]',
         },
         module: {
             rules: rules
@@ -82,7 +82,7 @@ module.exports = [
             path: path.resolve(__dirname, './dist/'),
             libraryTarget: 'amd',
             publicPath: 'https://unpkg.com/ipyvolume@' + version + '/dist/',
-            devtoolModuleFilenameTemplate: 'webpack://ipyvolume/[namespace]/[resource-path]?[loaders]',
+            devtoolModuleFilenameTemplate: 'webpack://jupyter-widgets/ipyvolume/[resource-path]?[loaders]',
         },
         devtool: 'source-map',
         module: {