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- Adding build targets for USD 25.08 in PR builds - Adding build targets for USD 25.11 in PR builds
- macos-26 - macos-26-intel - windows-25 - ubuntu-24.04 Updating the PR Matrix to build supported platforms against 2508 and 2511 Updating the full build matrix to include new supported platforms
generic - Adding MatX common dep packages for Linux
package which sets up python
ubuntu-24.04 as USD does not officially support this OS yet. macos-26-intel as there is no supported python setup for this OS currently.
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- Adding missed general notes within the changelog
- Updating badges within the README.md
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v2026.3 March 6th, 2026
General Changes:
- Fixed compatibility with USD 25.x
- Our version numbering is changing format to YYYY.0M (Year/Month) with an added patch if applicable
- Our clang-format configuration is now updated and formatting is now a requirement
- Include/header files have been cleaned up
Features
gltf
- add support for KHR_materials_coat extension
- Skip invalid IOR values < 1.0
sbsar
- relative image path resolution
Fixes
fbx
- fix FBX standard material import
- skeleton index validation / avoid default indexes / out of bounds checks
- fix skeletal animation for joints that only have curves on individual channels
- Handle color spaces correctly according to declared parameters
- Armature scale is applied only once through the USD hierarchy
gltf
- add input validation to prevent memory corruption vulnerabilities
- update readme to fix param name
obj
- adding computeNormals to SDF_FORMAT_ARG
- cpp 20 compilation fix
- Adjust FMT library dependency in the OBJ plugin to solve linker issues
sbsar
- specifying substance engine/framework for arm64
- folder/subfolder support when parsing SBSAR files
- filter SBSAR by graph type
- increase default cache size to 2GB for smooth 4K texture handling
- tests fix double free error on Linux by removing getRenderThreadState() in destructor
- tag texture attributes with color space information for MaterialX/OpenPBR
- Fix conversion of sbsar displacement to OpenPBR
- Revamp heuristic fallbacks for procedural input image path resolution
- Add inverted uv scale for use with openpbr
- Correct normal scale / bias in directx style sbsar files for OpenPBR
utils
- add asset path to input:file property of UsdPreviewSurface and ASM shaders
- switch to
ND_UsdUVTexture_23for texture reads in OpenPBR/MaterialX networks- add type checking to
setAttributeDefaultValue()to catch invalid data- check for empty values when setting the default value and forgo the type check
- readLayer to correctly processes instancing setups
- OpenPBR oriented material reading
- add general
preserveExtraMaterialInfofile format argument- improvements on ASM to OpenPBR conversion
- updating third-party dependencies
Build System
utils
- updated the baselines images for the fbx plugins to match colorspace changes