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CHANGELOG.md

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Changelog

Version 0.4 - 2024-07-15

Added

  • Asset resolver support (thanks, @expenses!)
  • Command line option to print licenses
  • Display name attribute for most glTF objects
  • Dynamic emitMtlx Sdf file format argument
  • Explicit documentation of GUC_BUILD_USDGLTF to README (thanks, @expenses!)
  • Help (-h / --help) command-line option
  • Support for KHR_materials_unlit extension
  • Third-party licenses to LICENSE file

Changed

  • Default input values are not authored anymore in MaterialX networks
  • Default material binding is now used when MaterialX is disabled (thanks, @lanxinger!)
  • Fallback tangents are now only generated if MaterialX is enabled
  • Improved prim naming heuristics
  • MaterialX 1.38.6 is now required
  • Prebuilt binaries do not require a specific Python version anymore
  • Primvar naming does not emit suffix for index 0 anymore
  • Removed dependency on OpenImageIO (stb_image is used as a fallback)
  • Removed explicit color space transformations
  • Removed glTF PBR implementation options
  • Renamed Sdf plugin id from 'glTF' to 'gltf' to conform with other projects
  • Reorder command line arguments to conform with UNIX conventions

Fixed

  • False-positive MSVC warning caused by Boost macros
  • Incorrect UsdPreviewSurface Sdf value types
  • Incorrect warning about greyscale texture alpha channel
  • Material name not being preserved if it starts with an underscore
  • Missing '.glb' extension in Sdf plugin definition
  • Missing UsdLux extents
  • Typo in Sdf plugin that could prevent file reading
  • UsdLuxShapingAPI not being applied

Version 0.3 - 2023-07-26

Added

Changed

  • Disabled file glTF PBR implementation option on USD v23.08+ due to an internal crash
  • Renamed 'tangentSigns' primvar to 'bitangentSigns'
  • Updated Ecosystem Limitations document with latest USD/MaterialX versions

Fixed

  • Normalmap UsdUVTexture:scale[3] not matching USD complianceChecker

Version 0.2 - 2023-01-09

Added

  • CMake config file installation for libguc
  • Custom data for generated mesh attributes
  • Display color estimation from material properties
  • Documentation on Ecosystem Limitations and Structure Mapping
  • Extent computation
  • GitHub Actions builds
  • Omittance of MaterialX multiplication nodes with factor 1
  • Option to export MaterialX glTF PBR as file
  • Sdf file format plugin
  • Support for glTF libraries (no scenes)
  • Test suite with graphical tests
  • Transmission as alpha-as-coverage to UsdPreviewSurfaces
  • UsdModelAPI metadata
  • USDZ export
  • Version information to header, executable and converted assets
  • Workaround for glTF assets referencing the wrong texture channel for alpha

Changed

  • CMake 3.15 is now required
  • MikkTSpace is now linked statically
  • Refined output USD file structure
  • Renamed guc_params struct to guc_options
  • Updated USD version to 22.11
  • Vertex colors are now stored as dedicated primvars (not as displayColors)
  • Vertex opacities are not generated for opaque materials

Fixed

  • Bug with base64 output buffer size estimation
  • Erroneous C11 compiler requirement
  • Fallback tangent generation
  • Flat normals and tangents being attempted to generate for line and point topologies
  • Flat normal generation not unindexing primvars
  • Handling of MaterialX C++ exceptions
  • Inactive scenes being visible
  • Incorrect MaterialX glTF PBR default values
  • Link errors with Boost and TBB (thanks, @ix-dcourtois!)
  • Location of MaterialX and OIIO libraries (thanks, @ix-dcourtois!)
  • MaterialX exception for very small or large float values
  • MaterialX inputs having multiple data source attributes
  • Missing MaterialX vertex color multiplication in case of missing base color texture
  • Mtlx-as-UsdShade error with USD 22.11
  • Multiple compiler warnings
  • Normal map tangent handling
  • Position independent code not being enabled for static library builds
  • Shared library symbols not being exported on Windows (thanks, @ix-dcourtois!)
  • USD MaterialBindingAPI schema not being applied

Version 0.1 - 2022-05-17

Initial release