AcademySoftwareFoundation / OpenPBR

Specification and reference implementation for the OpenPBR Surface shading model

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Anisotropic roughness in MaterialX implemetation differs from the specification

msuzuki-nvidia opened this issue · comments

The .mtlx is utilizing the <roughness_anisotropy> from pbrlib, however the formula used in the function differs from the specification.

<roughness_anisotropy> Specification formula
mtlx_opbr_aluminum_brushed pt_opbr_aluminum_brushed

That's a good note, thanks @msuzuki-nvidia, and we're planning to update this logic to match the current OpenPBR specification.