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Adding LamaGeneralizedSchlick and LamaIridescence Nodes (#1897)
1. Added a LamaGeneralizedSchlick node to MaterialX (Renderman definition: https://rmanwiki.pixar.com/display/REN26/LamaGeneralizedSchlick) 2. Added a LamaIridescence node to MaterialX (Renderman definition: https://rmanwiki.pixar.com/display/REN26/LamaIridescence)
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<?xml version="1.0"?> | ||
<materialx version="1.39" colorspace="acescg"> | ||
<nodedef name="ND_lama_generalized_schlick" node="LamaGeneralizedSchlick" nodegroup="pbr" doc="Lama generalized schlick" version="1.0" isdefaultversion="true"> | ||
<input name="reflectionTint" type="color3" value="1.0, 1.0, 1.0" uiname="Reflection Tint" uifolder="Main" | ||
doc="Color multiplier for external reflection. It should be used with parcimony, as a non-white value breaks physicality." /> | ||
<input name="transmissionTint" type="color3" value="1.0, 1.0, 1.0" uiname="Transmission Tint" uifolder="Main" | ||
doc="Color multiplier for rays going inside the medium (covers external transmission and internal reflection). It should be used with parcimony, as a non-white value breaks physicality. The prefered way to define the color of a dielectric is through the Interior attributes right below." /> | ||
<input name="fresnelMode" type="integer" uniform="true" enum="Scientific,Artistic" enumvalues="0,1" value="0" uiname="Fresnel Mode" uifolder="Main" | ||
doc="Fresnel mode" /> | ||
<input name="IOR" type="vector3" value="1.5,1.5,1.5" uiname="IOR" uifolder="Main" | ||
doc="Index of refraction (often denoted by eta), defining the color reflected by the surface in the normal direction." /> | ||
<input name="reflectivity" type="color3" value="0.04, 0.04, 0.04" uiname="Reflectivity" uifolder="Main" | ||
doc="Color reflected by the surface in the normal direction." /> | ||
<input name="reflectivity90" type="color3" value="1.0, 1.0, 1.0" uiname="Reflectivity90" uifolder="Main" | ||
doc="Color reflected by the surface at the grazing angle. Should be kept at 1,1,1 for most materials." /> | ||
<input name="reflectivityProfile" type="float" value="0.2" uiname="ReflectivityProfile" uifolder="Main" | ||
doc="The inverse of the exponent to use for Schlick." /> | ||
<input name="roughness" type="float" value="0.1" uimin="0.0" uimax="1.0" uiname="Roughness" uifolder="Main" | ||
doc="Micro-facet distribution roughness." /> | ||
<input name="normal" type="vector3" defaultgeomprop="Nworld" uiname="Normal" uifolder="Main" | ||
doc="Shading normal, typically defined by bump or normal mapping. Defaults to the smooth surface normal if not set." /> | ||
<input name="anisotropy" type="float" value="0.0" uimin="-1.0" uimax="1.0" uiname="Anisotropy" uifolder="Anisotropy" | ||
doc="Defines the amount of anisotropy, changing the co-tangent axis roughness from the original value to 1 (or to 0 with a negative value)." /> | ||
<input name="anisotropyDirection" type="vector3" defaultgeomprop="Tworld" uiname="Direction" uifolder="Anisotropy" | ||
doc="Overrides the surface tangent as the anisotropy direction." /> | ||
<input name="anisotropyRotation" type="float" value="0.0" uiname="Rotation" uifolder="Anisotropy" | ||
doc="Rotates the anisotropy direction (possibly overriden by the previous attribute) around the normal, from 0 to 360 degrees." /> | ||
<input name="absorptionColor" type="color3" value="1.0, 1.0, 1.0" uiname="Absorption Color" uifolder="Interior" | ||
doc="Absorption color" /> | ||
<input name="absorptionRadius" type="float" value="1.0" uiname="Absorption Radius" uifolder="Interior" | ||
doc="Absorption radius" /> | ||
<input name="scatterColor" type="color3" value="0.0, 0.0, 0.0" uiname="Scatter Color" uifolder="Interior" | ||
doc="Scatter color" /> | ||
<input name="scatterAnisotropy" type="float" value="0.0" uimin="-1.0" uimax="1.0" uiname="Scatter Anisotropy" uifolder="Interior" | ||
doc="Scatter anisotropy" /> | ||
<output name="out" type="BSDF" /> | ||
</nodedef> | ||
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<nodegraph name="IMPL_lama_generalized_schlick" nodedef="ND_lama_generalized_schlick"> | ||
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<!-- Dielectric IOR --> | ||
<extract name="ior_float" type="float"> | ||
<input name="in" type="vector3" interfacename="IOR" /> | ||
<input name="index" type="integer" value="0" /> | ||
</extract> | ||
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<!-- Color0 --> | ||
<convert name="convert_ior" type="color3"> | ||
<input name="in" type="vector3" interfacename="IOR" /> | ||
</convert> | ||
<add name="ior_plus_one" type="color3"> | ||
<input name="in1" type="color3" nodename="convert_ior" /> | ||
<input name="in2" type="float" value="1" /> | ||
</add> | ||
<subtract name="ior_sub_one" type="color3"> | ||
<input name="in1" type="color3" nodename="convert_ior" /> | ||
<input name="in2" type="float" value="1" /> | ||
</subtract> | ||
<divide name="ior_divide" type="color3"> | ||
<input name="in1" type="color3" nodename="ior_sub_one" /> | ||
<input name="in2" type="color3" nodename="ior_plus_one" /> | ||
</divide> | ||
<multiply name="ior_multiply" type="color3"> | ||
<input name="in1" type="color3" nodename="ior_divide" /> | ||
<input name="in2" type="color3" nodename="ior_divide" /> | ||
</multiply> | ||
<multiply name="ior_reflection_tint" type="color3"> | ||
<input name="in1" type="color3" nodename="ior_multiply" /> | ||
<input name="in2" type="color3" interfacename="reflectionTint" /> | ||
</multiply> | ||
<multiply name="reflectivity_reflection_tint" type="color3"> | ||
<input name="in1" type="color3" interfacename="reflectivity" /> | ||
<input name="in2" type="color3" interfacename="reflectionTint" /> | ||
</multiply> | ||
<switch name="fresnel_mode_switch_reflection" type="color3"> | ||
<input name="in1" type="color3" nodename="ior_reflection_tint" /> | ||
<input name="in2" type="color3" nodename="reflectivity_reflection_tint" /> | ||
<input name="which" type="integer" interfacename="fresnelMode" /> | ||
</switch> | ||
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<!-- Color90 --> | ||
<multiply name="reflectivity90_reflection_tint" type="color3"> | ||
<input name="in1" type="color3" interfacename="reflectivity90" /> | ||
<input name="in2" type="color3" interfacename="reflectionTint" /> | ||
</multiply> | ||
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<!-- Exponent --> | ||
<divide name="exponent" type="float"> | ||
<input name="in1" type="float" value="1" /> | ||
<input name="in2" type="float" interfacename="reflectivityProfile" /> | ||
</divide> | ||
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<!-- Roughness --> | ||
<subtract name="roughness_inverse" type="float"> | ||
<input name="in1" type="float" value="1.0" /> | ||
<input name="in2" type="float" interfacename="roughness" /> | ||
</subtract> | ||
<ifgreatereq name="delta" type="float"> | ||
<input name="in1" type="float" nodename="roughness_inverse" /> | ||
<input name="in2" type="float" interfacename="roughness" /> | ||
<input name="value1" type="float" interfacename="anisotropy" /> | ||
<input name="value2" type="float" value="0" /> | ||
</ifgreatereq> | ||
<multiply name="roughness_additional" type="float"> | ||
<input name="in1" type="float" interfacename="anisotropy" /> | ||
<input name="in2" type="float" nodename="delta" /> | ||
</multiply> | ||
<add name="roughness_bitangent" type="float"> | ||
<input name="in1" type="float" interfacename="roughness" /> | ||
<input name="in2" type="float" nodename="roughness_additional" /> | ||
</add> | ||
<clamp name="roughness_bitangent_clamped" type="float"> | ||
<input name="in" type="float" nodename="roughness_bitangent" /> | ||
</clamp> | ||
<combine2 name="roughness_linear" type="vector2"> | ||
<input name="in1" type="float" interfacename="roughness" /> | ||
<input name="in2" type="float" nodename="roughness_bitangent_clamped" /> | ||
</combine2> | ||
<power name="roughness_anisotropic_squared" type="vector2"> | ||
<input name="in1" type="vector2" nodename="roughness_linear" /> | ||
<input name="in2" type="float" value="2" /> | ||
</power> | ||
<max name="roughness_anisotropic_squared_clamped" type="vector2"> | ||
<input name="in1" type="vector2" nodename="roughness_anisotropic_squared" /> | ||
<input name="in2" type="float" value="0.000001" /> | ||
</max> | ||
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<!-- Tangent --> | ||
<multiply name="tangent_rotate_degree" type="float"> | ||
<input name="in1" type="float" interfacename="anisotropyRotation" /> | ||
<input name="in2" type="float" value="-360" /> | ||
</multiply> | ||
<rotate3d name="tangent_rotate" type="vector3"> | ||
<input name="in" type="vector3" interfacename="anisotropyDirection" /> | ||
<input name="amount" type="float" nodename="tangent_rotate_degree" /> | ||
<input name="axis" type="vector3" interfacename="normal" /> | ||
</rotate3d> | ||
<normalize name="tangent_rotate_normalize" type="vector3"> | ||
<input name="in" type="vector3" nodename="tangent_rotate" /> | ||
</normalize> | ||
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<!-- Interior --> | ||
<divide name="absorption" type="color3"> | ||
<input name="in1" type="color3" interfacename="absorptionColor" /> | ||
<input name="in2" type="float" interfacename="absorptionRadius" /> | ||
</divide> | ||
<convert name="absorption_vector" type="vector3"> | ||
<input name="in" type="color3" nodename="absorption" /> | ||
</convert> | ||
<convert name="scatter_vector" type="vector3"> | ||
<input name="in" type="color3" interfacename="scatterColor" /> | ||
</convert> | ||
<anisotropic_vdf name="interior_vdf" type="VDF"> | ||
<input name="absorption" type="vector3" nodename="absorption_vector" /> | ||
<input name="scattering" type="vector3" nodename="scatter_vector" /> | ||
<input name="anisotropy" type="float" interfacename="scatterAnisotropy" /> | ||
</anisotropic_vdf> | ||
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<!-- BTDF --> | ||
<dielectric_bsdf name="transmission_bsdf" type="BSDF"> | ||
<input name="weight" type="float" value="1.0" /> | ||
<input name="tint" type="color3" interfacename="transmissionTint" /> | ||
<input name="ior" type="float" nodename="ior_float" /> | ||
<input name="roughness" type="vector2" nodename="roughness_anisotropic_squared_clamped" /> | ||
<input name="normal" type="vector3" interfacename="normal" /> | ||
<input name="tangent" type="vector3" nodename="tangent_rotate_normalize" /> | ||
<input name="distribution" type="string" value="ggx" /> | ||
<input name="scatter_mode" type="string" value="T" /> | ||
</dielectric_bsdf> | ||
<layer name="transmission_layer" type="BSDF"> | ||
<input name="top" type="BSDF" nodename="transmission_bsdf" /> | ||
<input name="base" type="VDF" nodename="interior_vdf" /> | ||
</layer> | ||
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<!-- BRDF --> | ||
<generalized_schlick_bsdf name="reflection_generalized_schlick_bsdf" type="BSDF"> | ||
<input name="weight" type="float" value="1.0" /> | ||
<input name="color0" type="color3" nodename="fresnel_mode_switch_reflection" /> | ||
<input name="color90" type="color3" nodename="reflectivity90_reflection_tint" /> | ||
<input name="exponent" type="float" nodename="exponent" /> | ||
<input name="roughness" type="vector2" nodename="roughness_anisotropic_squared_clamped" /> | ||
<input name="normal" type="vector3" interfacename="normal" /> | ||
<input name="tangent" type="vector3" nodename="tangent_rotate_normalize" /> | ||
<input name="distribution" type="string" value="ggx" /> | ||
<input name="scatter_mode" type="string" value="R" /> | ||
</generalized_schlick_bsdf> | ||
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<!-- BSDF --> | ||
<layer name="generalized_schlick_bsdf" type="BSDF"> | ||
<input name="top" type="BSDF" nodename="reflection_generalized_schlick_bsdf" /> | ||
<input name="base" type="BSDF" nodename="transmission_layer" /> | ||
</layer> | ||
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<!-- Output --> | ||
<output name="out" type="BSDF" nodename="generalized_schlick_bsdf" /> | ||
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</nodegraph> | ||
</materialx> |
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<?xml version="1.0"?> | ||
<materialx version="1.39" colorspace="acescg"> | ||
<nodedef name="ND_lama_iridescence" node="LamaIridescence" nodegroup="pbr" doc="Lama iridescence" version="1.0" isdefaultversion="true"> | ||
<input name="roughness" type="float" value="0.01" uimin="0.0" uimax="1.0" uiname="Roughness" uifolder="Main" | ||
doc="Micro-facet distribution roughness." /> | ||
<input name="anisotropy" type="float" value="0.0" uimin="-1.0" uimax="1.0" uiname="Anisotropy" uifolder="Anisotropy" | ||
doc="Defines the amount of anisotropy, changing the co-tangent axis roughness from the original value to 1 (or to 0 with a negative value)." /> | ||
<input name="relativeFilmThickness" type="float" value="0.5" uimin="0.0" uimax="1.0" uiname="relativeFilmThickness" uifolder="Main" | ||
doc="Relative thin film thickness in the range from 0 to 1 will be scaled to the minimum and maximum thickness, respectively." /> | ||
<input name="minFilmThickness" type="float" value="400.0" uiname="minFilmThickness" uifolder="Main" | ||
doc="Minimum thin film thickness in nanometers, driving the iridescent effect." /> | ||
<input name="maxFilmThickness" type="float" value="800.0" uiname="maxFilmThickness" uifolder="Main" | ||
doc="Maximum thin film thickness in nanometers, driving the iridescent effect." /> | ||
<input name="filmIOR" type="float" value="1.3" uiname="filmIOR" uifolder="Main" | ||
doc="Thin film index of refraction, driving the iridescent effect." /> | ||
<output name="out" type="BSDF" /> | ||
</nodedef> | ||
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<nodegraph name="IMPL_lama_iridescence" nodedef="ND_lama_iridescence"> | ||
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<!-- Roughness --> | ||
<subtract name="roughness_inverse" type="float"> | ||
<input name="in1" type="float" value="1.0" /> | ||
<input name="in2" type="float" interfacename="roughness" /> | ||
</subtract> | ||
<ifgreatereq name="delta" type="float"> | ||
<input name="in1" type="float" nodename="roughness_inverse" /> | ||
<input name="in2" type="float" interfacename="roughness" /> | ||
<input name="value1" type="float" interfacename="anisotropy" /> | ||
<input name="value2" type="float" value="0" /> | ||
</ifgreatereq> | ||
<multiply name="roughness_additional" type="float"> | ||
<input name="in1" type="float" interfacename="anisotropy" /> | ||
<input name="in2" type="float" nodename="delta" /> | ||
</multiply> | ||
<add name="roughness_bitangent" type="float"> | ||
<input name="in1" type="float" interfacename="roughness" /> | ||
<input name="in2" type="float" nodename="roughness_additional" /> | ||
</add> | ||
<clamp name="roughness_bitangent_clamped" type="float"> | ||
<input name="in" type="float" nodename="roughness_bitangent" /> | ||
</clamp> | ||
<combine2 name="roughness_linear" type="vector2"> | ||
<input name="in1" type="float" interfacename="roughness" /> | ||
<input name="in2" type="float" nodename="roughness_bitangent_clamped" /> | ||
</combine2> | ||
<power name="roughness_anisotropic_squared" type="vector2"> | ||
<input name="in1" type="vector2" nodename="roughness_linear" /> | ||
<input name="in2" type="float" value="2" /> | ||
</power> | ||
<max name="roughness_anisotropic_squared_clamped" type="vector2"> | ||
<input name="in1" type="vector2" nodename="roughness_anisotropic_squared" /> | ||
<input name="in2" type="float" value="0.000001" /> | ||
</max> | ||
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<!-- Thinfilm Thickness --> | ||
<mix name="thinfilm_thickness" type="float"> | ||
<input name="fg" type="float" interfacename="maxFilmThickness" /> | ||
<input name="bg" type="float" interfacename="minFilmThickness" /> | ||
<input name="mix" type="float" interfacename="relativeFilmThickness" /> | ||
</mix> | ||
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<!-- BSDF --> | ||
<dielectric_bsdf name="iridescence_bsdf" type="BSDF"> | ||
<input name="roughness" type="vector2" nodename="roughness_anisotropic_squared_clamped" /> | ||
<input name="ior" type="float" value="1.0" /> | ||
<input name="thinfilm_thickness" type="float" nodename="thinfilm_thickness" /> | ||
<input name="thinfilm_ior" type="float" interfacename="filmIOR" /> | ||
<input name="distribution" type="string" value="ggx" /> | ||
<input name="scatter_mode" type="string" value="RT" /> | ||
</dielectric_bsdf> | ||
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<!-- Output --> | ||
<output name="out" type="BSDF" nodename="iridescence_bsdf" /> | ||
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</nodegraph> | ||
</materialx> |
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resources/Materials/TestSuite/pbrlib/surfaceshader/lama/lama_generalized_schlick.mtlx
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<?xml version="1.0"?> | ||
<materialx version="1.38" colorspace="acescg"> | ||
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<!-- LamaGeneralizedSchlick --> | ||
<LamaGeneralizedSchlick name="LamaGeneralizedSchlick" type="BSDF"> | ||
<input name="reflectionTint" type="color3" value="1.0, 1.0, 1.0" /> | ||
<input name="transmissionTint" type="color3" value="1.0, 1.0, 1.0" /> | ||
<input name="fresnelMode" type="integer" value="0" /> | ||
<input name="IOR" type="vector3" value="1.5,1.5,1.5" /> | ||
<input name="reflectivity" type="color3" value="0.04, 0.04, 0.04" /> | ||
<input name="reflectivity90" type="color3" value="1.0, 1.0, 1.0" /> | ||
<input name="reflectivityProfile" type="float" value="0.2" /> | ||
<input name="roughness" type="float" value="0.1" /> | ||
<input name="anisotropy" type="float" value="0.0" /> | ||
<input name="anisotropyRotation" type="float" value="0.0" /> | ||
<input name="absorptionColor" type="color3" value="1.0, 1.0, 1.0" /> | ||
<input name="absorptionRadius" type="float" value="1.0" /> | ||
<input name="scatterColor" type="color3" value="0.0, 0.0, 0.0" /> | ||
<input name="scatterAnisotropy" type="float" value="0.0" /> | ||
</LamaGeneralizedSchlick> | ||
<surface name="LamaGeneralizedSchlickSurface" type="surfaceshader"> | ||
<input name="bsdf" type="BSDF" nodename="LamaGeneralizedSchlick" /> | ||
</surface> | ||
<surfacematerial name="LamaGeneralizedSchlickTest" type="material"> | ||
<input name="surfaceshader" type="surfaceshader" nodename="LamaGeneralizedSchlickSurface" /> | ||
</surfacematerial> | ||
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</materialx> |
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resources/Materials/TestSuite/pbrlib/surfaceshader/lama/lama_iridescence.mtlx
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<?xml version="1.0"?> | ||
<materialx version="1.38" colorspace="acescg"> | ||
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<!-- LamaIridescence --> | ||
<LamaIridescence name="LamaIridescence" type="BSDF"> | ||
<input name="roughness" type="float" value="0.01" /> | ||
<input name="anisotropy" type="float" value="0.0" /> | ||
<input name="relativeFilmThickness" type="float" value="0.5" /> | ||
<input name="minFilmThickness" type="float" value="400.0" /> | ||
<input name="maxFilmThickness" type="float" value="800.0" /> | ||
<input name="filmIOR" type="float" value="1.3" /> | ||
</LamaIridescence> | ||
<surface name="LamaIridescenceSurface" type="surfaceshader"> | ||
<input name="bsdf" type="BSDF" nodename="LamaIridescence" /> | ||
</surface> | ||
<surfacematerial name="LamaIridescenceTest" type="material"> | ||
<input name="surfaceshader" type="surfaceshader" nodename="LamaIridescenceSurface" /> | ||
</surfacematerial> | ||
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</materialx> |