Strange light behavior with different far plane values of orthographic camera #4473
Description
Bevy version
latest (8630b19)
Operating system & version
OS: Artix Linux x86_64
Linux Kernel: 5.17.2-zen2-1-zen
GPU: NVIDIA GeForce 920MX
Nvidia driver: 510.60.02-1
What you did
Loaded a glTF scene with an orthographic camera and a point light in it:
use bevy::prelude::*;
fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
commands.spawn_scene(asset_server.load("ortho10.gltf#Scene0"));
}
fn main() {
App::new()
.add_plugins(DefaultPlugins)
.add_startup_system(setup)
.run();
}To test and experiment with this, edit the zfar field of the camera in the file provided:
ortho10.gtlf
{
"asset" : {
"generator" : "Khronos glTF Blender I/O v1.8.19",
"version" : "2.0"
},
"extensionsUsed" : [
"KHR_lights_punctual"
],
"extensionsRequired" : [
"KHR_lights_punctual"
],
"extensions" : {
"KHR_lights_punctual" : {
"lights" : [
{
"color" : [
1,
1,
1
],
"intensity" : 1000,
"type" : "point",
"name" : "Light.001"
}
]
}
},
"scene" : 0,
"scenes" : [
{
"name" : "Scene",
"nodes" : [
0,
3,
6,
7
]
}
],
"nodes" : [
{
"mesh" : 0,
"name" : "Cube",
"translation" : [
0,
1,
0
]
},
{
"extensions" : {
"KHR_lights_punctual" : {
"light" : 0
}
},
"name" : "Light_Orientation_Orientation",
"rotation" : [
-0.7071067690849304,
0,
0,
0.7071067690849304
]
},
{
"children" : [
1
],
"name" : "Light_Orientation"
},
{
"children" : [
2
],
"name" : "Light",
"rotation" : [
0.16907575726509094,
0.7558803558349609,
-0.27217137813568115,
0.570947527885437
],
"translation" : [
4.076245307922363,
5.903861999511719,
-1.0054539442062378
]
},
{
"camera" : 0,
"name" : "Camera_Orientation_Orientation",
"rotation" : [
-0.7071067690849304,
0,
0,
0.7071067690849304
]
},
{
"children" : [
4
],
"name" : "Camera_Orientation"
},
{
"children" : [
5
],
"name" : "Camera",
"rotation" : [
0.40501639246940613,
0.4532789885997772,
-0.24283890426158905,
0.7559954524040222
],
"translation" : [
7.977607727050781,
6.902405738830566,
4.161380290985107
]
},
{
"mesh" : 1,
"name" : "Plane",
"scale" : [
10.624591827392578,
10.624591827392578,
10.624591827392578
]
}
],
"cameras" : [
{
"name" : "Camera.001",
"orthographic" : {
"xmag" : 10,
"ymag" : 10,
"zfar" : 100,
"znear" : 0.10000000149011612
},
"type" : "orthographic"
}
],
"materials" : [
{
"doubleSided" : true,
"name" : "Material.001",
"pbrMetallicRoughness" : {
"baseColorFactor" : [
0.057456985116004944,
0.0665164664387703,
0.8000000715255737,
1
],
"metallicFactor" : 0,
"roughnessFactor" : 0.4000000059604645
}
},
{
"doubleSided" : true,
"name" : "Material.002",
"pbrMetallicRoughness" : {
"baseColorFactor" : [
0.8000000715255737,
0.2788206934928894,
0.2428315132856369,
1
],
"metallicFactor" : 0,
"roughnessFactor" : 0.5
}
}
],
"meshes" : [
{
"name" : "Cube.001",
"primitives" : [
{
"attributes" : {
"POSITION" : 0,
"NORMAL" : 1,
"TEXCOORD_0" : 2
},
"indices" : 3,
"material" : 0
}
]
},
{
"name" : "Plane",
"primitives" : [
{
"attributes" : {
"POSITION" : 4,
"NORMAL" : 5,
"TEXCOORD_0" : 6
},
"indices" : 7,
"material" : 1
}
]
}
],
"accessors" : [
{
"bufferView" : 0,
"componentType" : 5126,
"count" : 24,
"max" : [
1,
1,
1
],
"min" : [
-1,
-1,
-1
],
"type" : "VEC3"
},
{
"bufferView" : 1,
"componentType" : 5126,
"count" : 24,
"type" : "VEC3"
},
{
"bufferView" : 2,
"componentType" : 5126,
"count" : 24,
"type" : "VEC2"
},
{
"bufferView" : 3,
"componentType" : 5123,
"count" : 36,
"type" : "SCALAR"
},
{
"bufferView" : 4,
"componentType" : 5126,
"count" : 4,
"max" : [
1,
0,
1
],
"min" : [
-1,
0,
-1
],
"type" : "VEC3"
},
{
"bufferView" : 5,
"componentType" : 5126,
"count" : 4,
"type" : "VEC3"
},
{
"bufferView" : 6,
"componentType" : 5126,
"count" : 4,
"type" : "VEC2"
},
{
"bufferView" : 7,
"componentType" : 5123,
"count" : 6,
"type" : "SCALAR"
}
],
"bufferViews" : [
{
"buffer" : 0,
"byteLength" : 288,
"byteOffset" : 0
},
{
"buffer" : 0,
"byteLength" : 288,
"byteOffset" : 288
},
{
"buffer" : 0,
"byteLength" : 192,
"byteOffset" : 576
},
{
"buffer" : 0,
"byteLength" : 72,
"byteOffset" : 768
},
{
"buffer" : 0,
"byteLength" : 48,
"byteOffset" : 840
},
{
"buffer" : 0,
"byteLength" : 48,
"byteOffset" : 888
},
{
"buffer" : 0,
"byteLength" : 32,
"byteOffset" : 936
},
{
"buffer" : 0,
"byteLength" : 12,
"byteOffset" : 968
}
],
"buffers" : [
{
"byteLength" : 980,
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}
]
}
What you expected to happen
Proper lighting
What actually happened
Lighting behaving strangely on different far settings of the orthographic camera set in Blender:
30
50
100
1000
Additional Information
Note that at a 1000, the lighted parts of the scene are not visible in a 16:9 window and I had to stretch it. In #4005, the light was being "cutoff" because the far value was not loaded from glTF, and by default, it was being set to 0. Same thing is happening here.