There are two new optional controls for path-traced subsurface scattering - Attribute "trace" "int sssautobias" and "trace" "float sssbias". In the rare cases where the automatically computed bias for path-traced subsurface scattering needs tweaking, one can set "sssautobias" to 0 and "sssbias" to a desired value such as 1e-6. The default values are 1 for "sssautobias" and 1e-4 for "sssbias".
- Allow volumes to output their AOVs via PxrTee
PxrTee can now export AOV's from the shading networks for Volumes.
The PxrPrimvar built-in names "curvature_u" and "curvature_v" for principal curvatures can now also be written "curvatureU" and "curvatureV". This is for forward compatibility with the OSL version of PxrPrimvar in RenderMan 24.
We have deprecated the behavior where connecting a utility pattern to a PxrSurface node forces uncached opacity computations. This has been seen to be a major performance detriment, but can be re-enabled with Option "user" "int utilityPatternForcesOpacity" .
- Added support for OpenEXR Arbitrary Metadata.
- PxrAttribute has a new resultI output to allow users to chain PxrAttribute nodes.