Masuo Suzuki

[EMSUSD-1061] UV is incorrect when importing left-handed polygons

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**Describe the bug** When polygons with `orientation = "leftHanded"` is read using `File > Import`, the UV is incorrect.  It works fine if the same USD file is referenced...

Add Chiang hair BSDF

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Add Chiang hair BSDF. This PR provides Chiang hair BSDF model and related nodes proposed by #1973 The nodes to add are: - `` : The BSDF - `` :...

# MaterialX Hair BSDF Proposal This document proposes a new MaterialX hair BSDF node and a set of support functions which can be used to build an all purpose hair...

Connect `geometry_thin_walled` flag to <surface>

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Connect `geometry_thin_walled` flag to ``.

This PR adds GLSL and MDL implementations for the flake nodes proposed in #2609. Nodes to add: - `` - ``

Proposal: MaterialX Flake3d Node

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# MaterialX Flake3d Node Proposal ## Summary Flake generation provides a procedural method to create sparkling, metallic flake effects commonly seen in automotive paints, cosmetics, and other materials with embedded...