Version 1.38.7

Added

• Added the MaterialX Graph Editor, an example application for visualizing, creating, and editing MaterialX graphs.
• Added support for the Metal Shading Language in MaterialX shader generation and rendering.
• Added support for the generalized_schlick_edf node, enabling the expression of coated emissive surfaces.
• Added support for the adobergb and lin_adobergb color spaces in shader generation.
• Added uisoftmin and uisoftmax attributes to mix nodes and IOR inputs.
• Added support for authored bitangent vectors in GLSL, selected by the hwImplicitBitangents generator option.
• Added a tangent input to the glTF PBR shading model.
• Added a Clang Format step to GitHub Actions builds.
• Added support for Xcode 14.

Changed

• Included the standard data libraries in MaterialX Python packages.
• Improved the support library and node implementations for OSL generation.
• Updated MDL shader generation to support MDL 1.7.
• Improved the handling of functional graphs in MDL generation.
• Upgraded the NanoGUI version in the viewer to support Apple M1 builds.
• Upgraded the Catch library to version 2.13.9.

Fixed

• Fixed logic for tangent basis orthogonalization in generated GLSL.
• Fixed logic for metallic F90 and an opacity edge case in UsdPreviewSurface.
• Fixed parsing of inline source code variables in node implementations.