Contents
Welcome to RenderMan 23.6!
This release introduces improvements to RenderMan.
Please dive right into the release notes below for more detailed information on the latest version of your favorite renderer!
New Features in 23.6
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.
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.
The fix for correctly combining the two shadow exclusion subsets defined by Attribute "trace" "string shadowexcludesubset" and the "string shadowExcludeSubset" parameter is now extended to dome lights as well.
Fixes
Fix for bugs batched trace() with multiple shader groups in the hits.
Fixed a bug that could return garbage derivatives on failed texture lookups from OSL.
Miscellaneous Changes
improvements to light selection learning
improve the behavior of denoised Marschner by changing how the albedo is calculated