13 lines
836 B
Markdown
13 lines
836 B
Markdown
# PBR Materials
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## KHR Texture Transforms
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Texture repeats for PBR materials on prims are based on the [KHR\_texture\_transform](https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_texture_transform) spec, and thus should be expected to behave according to the spec. We currently suport offset, rotation, and scale from the spec. texCoord is not currently supported.
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PBR materials should have approximately correct lighting based on the normal texture:
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- With default texture transforms, assuming the prim or model has correct normals and tangents
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- With a texture transform applied, especially rotation or negative scale
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- With a texture animation applied via `llSetTextureAnim`, especially a rotation animation
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- Note: Texture animations are not guaranteed to loop when a PBR texture transform is applied
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