OptionalbaseBase color texture descriptor to use if any. Format should be rgba8unorm-srgb.
OptionalemissiveEmissive texture descriptor to use if any. Format should be rgba8unorm-srgb.
OptionalocclusionOcclusion texture descriptor to use if any. Format must be at least r8unorm.
OptionalnormalNormal texture descriptor to use if any. Format should be rgba8unorm.
OptionalmetallicMetallic roughness texture descriptor to use if any. Format should be rgba8unorm.
OptionalspecularSpecular texture descriptor (mixing both specular color in the RGB channels and specular intensity in the A channel) to use if any. Format should be rgba8unorm-srgb.
OptionalspecularSpecular intensity texture descriptor (using the A channel) to use if any. Format should be rgba8unorm-srgb or rgba8unorm.
OptionalspecularSpecular color texture descriptor (using the RGB channels) to use if any. Format should be rgba8unorm-srgb.
ShaderTextureDescriptor used for a LitMesh with
Phongshading.