4.0.0-usd.201.0

Release Date: September 2023

Added

• New Universal Material Mapper v2 (UMM2) add-on.

• Support invoking UMM2 Python functions from Blender USD IO code.(OM-80646)

• Support Python hooks and chasers to extend IO functionality.

• Generic attribute import and export support.

• New curve/hair export (implemented by Blender Dev community).

• USD Preview Surface IO: Convert between UsdTransform2d and Blender Mapping shader. (OM-63569)

Fixed

• Fix widths for imported Bezier curves.

• Fix issues where the ‘Convert uv to st’ export option had no effect. (OM-102889)

• USD Preview Surface import: Use Alpha Hashed blend mode by default. (OM-60239)

• Bezier curve exports do not match control points. (OM-91543)

• Fix error importing point lights.

• Incorrect light size and radius on USD export. (OM-95562)

• USD Preview Surface: fix textures alpha mapping.

• Suppress warnings that edge-domain attributes can’t be exported.

• Fix issue where the ‘Convert to MDL’ toggle in the Connector export dialog is grayed out. (OM-103374)

• UMM: Fix empty material when no conversion is defined. (OM-101972)

• UMM: Fix failure to import USD Preview Surface.

• UMM: Fix error exporting material previously imported with UMM. (OM-101566)

• UMM: Support for exporting Blender material graph groups with multiple input nodes (OM-106634)

• UMM: Alpha channel on ImageTexture nodes is now respected on export (OM-103662)

• UMM: Fixed export of GlassBSDF shaders (OM-103663)

• UMM: Fixed export/import of bump shaders (OM-109094)

Improved

• Refactor and improvements to UsdSkel (skeleton and blend shape) animation import. (PR #110912)

• Nucleus Connector add-on: Expose generic attribute IO options. (OM-101983)

• USD export: ensure material prim path is under the default prim. (OM-98539)

• UMM: Improved warnings.

• UMM: Improved support for importing UsdShade MDL shader nodes into Blender.