...

• Parameters with unknown widget types are still added to hda

• Fixed a crash when merging vdbs
• Fixed logging bug when using the preset browser with textures
• A bug causing importing and exporting shader networks with PxrOSL shaders to the preset browser has been fixed
• A bug causing importing and exporting nodes with arrays to the preset browser has been fixed
• We now set packed alembic user attributes
• Various bugs in instancing have been fixed
• The preset browser did not import material assets with textures correctly
• Fixed a bug where primvars are dropped when material is applied on SOP
• Fixed a motion blur bug with packed geo
• Fixed bug where velocity motion blur was not applied when packed SOP was not time-dependent

Miscellaneous Changes

• Bxdf output type changed to surface to allow Bxdf inputs

• Filemerge now works with vdbs
• oslbuilder now shows up in PxrMaterialBuilder
• H18.0.421 now supports a callback to the renderview stop button
• Added support for ptmotionblur="deform" on Instance OBJ
• Added RFH_USER_LOG_DIR, RFH_USER_OTLS_DIR, RFH_USER_PREF_DIR
• Reorganized ROP for baking options

Known Issues

• Display edits cannot changed from the image tool to mplay
• Cross-frame denoising pdg support
• Phantom objects are removed from all rays, not just camera rays
• Applying undo of deleted nodes or collapsing to subnet may not work as expected
• Rewiring subnet indirect inputs

...