standard_surface.mtlx

<?xml version="1.0" encoding="UTF-8"?>
<materialx version="1.36">
  <!--
    Autodesk Standard Surface node definition.
  -->
  <nodedef name="ND_standard_surface_surfaceshader" node="standard_surface" type="surfaceshader" nodegroup="pbr"
           doc="A surface uber shader based on the Arnold standard surface shader">
      <input name="base" type="float" value="0.8" uiname="Base" uifolder="Base"/>
      <input name="base_color" type="color3" value="1, 1, 1" uiname="Base Color"  uifolder="Base"/>
      <input name="diffuse_roughness" type="float" value="0" uiname="Diffuse Roughness"  uifolder="Diffuse"/>
      <input name="specular" type="float" value="1" uiname="Specular" uifolder="Specular"/>
      <input name="specular_color" type="color3" value="1, 1, 1" uiname="Specular Color" uifolder="Specular"/>
      <input name="specular_roughness" type="float" value="0.1" uiname="Specular Roughness" uifolder="Specular"/>
      <input name="specular_IOR" type="float" value="1.52" uiname="Index of Refraction" uifolder="Specular"/>
      <input name="specular_anisotropy" type="float" value="0" uiname="Specular Anisotropy" uifolder="Specular"/>
      <input name="specular_rotation" type="float" value="0" uiname="Specular Rotation" uifolder="Specular"/>
      <input name="metalness" type="float" value="0" uiname="Metalness" uifolder="Specular"/>
      <input name="transmission" type="float" value="0" uiname="Transmission" uifolder="Transmission"/>
      <input name="transmission_color" type="color3" value="1, 1, 1" uiname="Transmission Color" uifolder="Transmission"/>
      <input name="transmission_depth" type="float" value="0" uiname="Transmission Depth" uifolder="Transmission"/>
      <input name="transmission_scatter" type="color3" value="0, 0, 0" uiname="Transmission Scatter" uifolder="Transmission"/>
      <input name="transmission_scatter_anisotropy" type="float" value="0" uiname="Transmission Anisotropy" uifolder="Transmission"/>
      <input name="transmission_dispersion" type="float" value="0" uiname="Transmission Dispersion" uifolder="Transmission"/>
      <input name="transmission_extra_roughness" type="float" value="0" uiname="Transmission Roughness" uifolder="Transmission"/>
      <input name="subsurface" type="float" value="0" uiname="Subsurface" uifolder="Subsurface"/>
      <input name="subsurface_color" type="color3" value="1, 1, 1" uiname="Subsurface Color" uifolder="Subsurface"/>
      <input name="subsurface_radius" type="vector3" value="1, 1, 1" uiname="Subsurface Radius" uifolder="Subsurface"/>
      <input name="subsurface_scale" type="float" value="1" uiname="Subsurface Scale" uifolder="Subsurface"/>
      <input name="subsurface_anisotropy" type="float" value="0" uiname="Subsurface Anisotropy" uifolder="Subsurface"/>
      <input name="sheen" type="float" value="0" uiname="Sheen" uifolder="Sheen"/>
      <input name="sheen_color" type="color3" value="1, 1, 1" uiname="Sheen Color" uifolder="Sheen"/>
      <input name="sheen_roughness" type="float" value="0.3" uiname="Sheen Roughness" uifolder="Sheen"/>
      <input name="thin_walled" type="boolean" value="false" uiname="Thin Walled" uifolder="Geometry"/>
      <input name="normal" type="vector3" defaultgeomprop="Nworld" uiname="Normal" uifolder="Geometry"/>
      <input name="tangent" type="vector3"  defaultgeomprop="Tworld" uiname="Tangent Input" uifolder="Geometry"/>
      <input name="coat" type="float" value="0" uiname="Coat" uifolder="Coat"/>
      <input name="coat_color" type="color3" value="1, 1, 1" uiname="Coat Color" uifolder="Coat"/>
      <input name="coat_roughness" type="float" value="0.1" uiname="Coat Roughness" uifolder="Coat"/>
      <input name="coat_anisotropy" type="float" value="0.0" uiname="Coat Anisotropy" uifolder="Coat"/>
      <input name="coat_rotation" type="float" value="0.0" uiname="Coat Rotation" uifolder="Coat"/>
      <input name="coat_IOR" type="float" value="1.5" uiname="Coat Index of Refraction" uifolder="Coat"/>
      <input name="coat_normal" type="vector3" defaultgeomprop="Nworld" uiname="Coat normal" uifolder="Geometry"/>
      <input name="coat_affect_color" type="float" value="0" uiname="Coat Affect Color" uifolder="Coat"/>
      <input name="coat_affect_roughness" type="float" value="0" uiname="Coat Affect Roughness" uifolder="Coat"/>
      <input name="thin_film_thickness" type="float" value="0" uiname="Thin Film Thickness" uifolder="Thin Film"/>
      <input name="thin_film_IOR" type="float" value="1.5" uiname="Thin Film Index of Refraction" uifolder="Thin Film"/>
      <input name="emission" type="float" value="0" uiname="Emission" uifolder="Emission"/>
      <input name="emission_color" type="color3" value="1, 1, 1" uiname="Emission Color" uifolder="Emission"/>
      <input name="opacity" type="color3" value="1, 1, 1" uiname="Opacity" uifolder="Geometry"/>
  </nodedef>

  <!--
    Autodesk Standard Surface nodegraph implementation.
  -->
  <nodegraph name="IMPL_standard_surface_surfaceshader" nodedef="ND_standard_surface_surfaceshader">

    <!-- Roughness influence by coat-->
    <multiply name="coat_affect_roughness_multiply1" type="float">
      <input name="in1" type="float" interfacename="coat_affect_roughness" />
      <input name="in2" type="float" interfacename="coat" />
    </multiply>
    <multiply name="coat_affect_roughness_multiply2" type="float">
      <input name="in1" type="float" nodename="coat_affect_roughness_multiply1" />
      <input name="in2" type="float" interfacename="coat_roughness" />
    </multiply>
    <mix name="coat_affected_rougness" type="float">
      <input name="fg" type="float" value="1.0" />
      <input name="bg" type="float" interfacename="specular_roughness" />
      <input name="mix" type="float" nodename="coat_affect_roughness_multiply2" />
    </mix>
    <roughness_anisotropy name="main_rougness" type="roughnessinfo">
      <input name="roughness" type="float" nodename="coat_affected_rougness" />
      <input name="anisotropy" type="float" interfacename="specular_anisotropy" />
    </roughness_anisotropy>

    <!-- Colors influenced by coat ("coat gamma") -->
    <clamp name="coat_clamped" type="float">
      <input name="in" type="float" interfacename="coat" />
    </clamp>
    <multiply name="coat_gamma_multiply" type="float">
      <input name="in1" type="float" nodename="coat_clamped" />
      <input name="in2" type="float" interfacename="coat_affect_color" />
    </multiply>
    <add name="coat_gamma" type="float">
      <input name="in1" type="float" nodename="coat_gamma_multiply" />
      <input name="in2" type="float" value="1.0" />
    </add>
    <power name="coat_affected_diffuse_color" type="color3">
      <input name="in1" type="color3" interfacename="base_color" />
      <input name="in2" type="float" nodename="coat_gamma" />
    </power>
    <power name="coat_affected_subsurface_color" type="color3">
      <input name="in1" type="color3" interfacename="subsurface_color" />
      <input name="in2" type="float" nodename="coat_gamma" />
    </power>

    <!-- Diffuse Layer -->
    <diffuse_brdf name="diffuse_bsdf" type="BSDF">
      <input name="weight" type="float" interfacename="base" />
      <input name="color" type="color3" nodename="coat_affected_diffuse_color" />
      <input name="roughness" type="float" interfacename="diffuse_roughness" />
      <input name="normal" type="vector3" interfacename="normal" />
    </diffuse_brdf>
    <sheen_brdf name="sheen_bsdf" type="BSDF">
      <input name="weight" type="float" interfacename="sheen" />
      <input name="color" type="color3" interfacename="sheen_color" />
      <input name="roughness" type="float" interfacename="sheen_roughness" />
      <input name="normal" type="vector3" interfacename="normal" />
      <input name="base" type="BSDF" nodename="diffuse_bsdf" />
    </sheen_brdf>

    <!-- Subsurface Layer -->
    <diffuse_btdf name="translucent_bsdf" type="BSDF">
      <input name="weight" type="float" value="1.0" />
      <input name="color" type="color3" nodename="coat_affected_subsurface_color" />
      <input name="normal" type="vector3" interfacename="normal" />
    </diffuse_btdf>
    <subsurface_brdf name="subsurface_bsdf" type="BSDF">
      <input name="weight" type="float" value="1.0" />
      <input name="color" type="color3" nodename="coat_affected_subsurface_color" />
      <input name="radius" type="vector3" interfacename="subsurface_radius"/>
      <input name="anisotropy" type="float" interfacename="subsurface_anisotropy"/>
      <input name="normal" type="vector3" interfacename="normal" />
    </subsurface_brdf>
    <convert name="subsurface_selector" type="float">
      <input name="in" type="boolean" interfacename="thin_walled" />
    </convert>
    <mix name="selected_subsurface_bsdf" type="BSDF">
      <input name="fg" type="BSDF" nodename="translucent_bsdf" />
      <input name="bg" type="BSDF" nodename="subsurface_bsdf" />
      <input name="mix" type="float" nodename="subsurface_selector" />
    </mix>
    <mix name="subsurface_mix" type="BSDF">
      <input name="fg" type="BSDF" nodename="selected_subsurface_bsdf" />
      <input name="bg" type="BSDF" nodename="sheen_bsdf" />
      <input name="mix" type="float" interfacename="subsurface" />
    </mix>

    <!-- Transmission Layer -->
    <dielectric_btdf name="transmission_bsdf" type="BSDF">
      <input name="weight" type="float" value="1.0" />
      <input name="tint" type="color3" interfacename="transmission_color" />
      <input name="ior" type="float" interfacename="specular_IOR" />
      <input name="roughness" type="roughnessinfo" nodename="main_rougness" />
      <input name="normal" type="vector3" interfacename="normal" />
      <input name="tangent" type="vector3" interfacename="tangent" />
      <input name="distribution" type="string" value="ggx" />
      <input name="interior" type="VDF" value="" />
    </dielectric_btdf>
    <mix name="transmission_mix" type="BSDF">
      <input name="fg" type="BSDF" nodename="transmission_bsdf" />
      <input name="bg" type="BSDF" nodename="subsurface_mix" />
      <input name="mix" type="float" interfacename="transmission" />
    </mix>

    <!-- Specular Layer -->
    <dielectric_brdf name="specular_bsdf" type="BSDF">
      <input name="weight" type="float" interfacename="specular" />
      <input name="tint" type="color3" interfacename="specular_color" />
      <input name="ior" type="float" interfacename="specular_IOR" />
      <input name="roughness" type="roughnessinfo" nodename="main_rougness" />
      <input name="normal" type="vector3" interfacename="normal" />
      <input name="tangent" type="vector3" interfacename="tangent" />
      <input name="distribution" type="string" value="ggx" />
      <input name="base" type="BSDF" nodename="transmission_mix" />
    </dielectric_brdf>

    <!-- Metal Layer -->
    <conductor_brdf name="metal_bsdf" type="BSDF">
      <input name="weight" type="float" interfacename="base" />
      <input name="reflectivity" type="color3" interfacename="base_color"/>
      <input name="edgecolor" type="color3" interfacename="specular_color"/>
      <input name="roughness" type="roughnessinfo" nodename="main_rougness" />
      <input name="normal" type="vector3" interfacename="normal" />
      <input name="tangent" type="vector3" interfacename="tangent" />
      <input name="distribution" type="string" value="ggx" />
    </conductor_brdf>
    <mix name="metalness_mix" type="BSDF">
      <input name="fg" type="BSDF" nodename="metal_bsdf" />
      <input name="bg" type="BSDF" nodename="specular_bsdf" />
      <input name="mix" type="float" interfacename="metalness" />
    </mix>

    <!-- Coat Layer -->
    <mix name="coat_attenuation" type="color3" >
      <input name="fg" type="color3" interfacename="coat_color" />
      <input name="bg" type="color3" value="1.0, 1.0, 1.0" />
      <input name="mix" type="float" interfacename="coat" />
    </mix>
    <multiply name="metalness_mix_attenuated" type="BSDF">
      <input name="in1" type="BSDF" nodename="metalness_mix" />
      <input name="in2" type="color3" nodename="coat_attenuation" />
    </multiply>
    <roughness_anisotropy name="coat_roughness" type="roughnessinfo">
      <input name="roughness" type="float" interfacename="coat_roughness" />
      <input name="anisotropy" type="float" interfacename="coat_anisotropy" />
    </roughness_anisotropy>
    <dielectric_brdf name="coat_bsdf" type="BSDF">
      <input name="weight" type="float" interfacename="coat" />
      <input name="tint" type="color3" value="1.0, 1.0, 1.0" />
      <input name="ior" type="float" interfacename="coat_IOR" />
      <input name="roughness" type="roughnessinfo" nodename="coat_roughness" />
      <input name="normal" type="vector3" interfacename="coat_normal" />
      <input name="distribution" type="string" value="ggx" />
      <input name="base" type="BSDF" nodename="metalness_mix_attenuated" />
    </dielectric_brdf>

    <!-- Emission Layer -->
    <multiply name="emission_weight" type="color3">
      <input name="in1" type="color3" interfacename="emission_color" />
      <input name="in2" type="float" interfacename="emission" />
    </multiply>
    <fresnel name="coat_fresnel" type="float">
      <input name="ior" type="float" interfacename="coat_IOR" />
      <input name="normal" type="vector3" interfacename="coat_normal" />
    </fresnel>
    <invert name="coat_fresnel_inv" type="float">
      <input name="in" type="float" nodename="coat_fresnel" />
    </invert>
    <multiply name="coat_color_fresnel" type="color3">
      <input name="in1" type="color3" interfacename="coat_color" />
      <input name="in2" type="float" nodename="coat_fresnel_inv" />
    </multiply>
    <mix name="coat_emission_attenuation" type="color3" >
      <input name="fg" type="color3" nodename="coat_color_fresnel" />
      <input name="bg" type="color3" value="1.0, 1.0, 1.0" />
      <input name="mix" type="float" interfacename="coat" />
    </mix>
    <multiply name="emission_weight_attenuated" type="color3">
      <input name="in1" type="color3" nodename="emission_weight" />
      <input name="in2" type="color3" nodename="coat_emission_attenuation" />
    </multiply>
    <uniform_edf name="emission_edf" type="EDF">
      <input name="intensity" type="color3" nodename="emission_weight_attenuated" />
    </uniform_edf>

    <!-- Surface construction with opacity -->
    <!-- Node <surface> only supports monochromatic opacity so use the luminance of input opacity color -->
    <luminance name="opacity_luminance" type="color3">
      <input name="in" type="color3" interfacename="opacity" />
    </luminance>
    <surface name="standard_surface_constructor" type="surfaceshader">
      <input name="bsdf" type="BSDF" nodename="coat_bsdf" />
      <input name="edf" type="EDF" nodename="emission_edf" />
      <input name="opacity" type="float" nodename="opacity_luminance" channels="r"/>
    </surface>

    <!-- Output -->
    <output name="out" type="surfaceshader" nodename="standard_surface_constructor" />

  </nodegraph>
</materialx>