...
- When rendering with adaptive sampling enabled using the GPU, there are known stability issues on complicated assets using string attribute lookups that may lead to a crash. This should not happen when rendering on the CPU only. These issues have already been addressed for the next dot release. RMAN-22085
- In the 26.0 release, XPU may crash on certain non-manifold subdivision mesh geometry (whereas previous XPU versions would render fine and RIS would issue a warning). This will be addressed in the next dot release.
- The GPU portion of XPU can render artifacts with trace:reflectexcludesubset. RMAN-20393
- Support for homogeneous single scattering in PxrSurface is incomplete. Renders will be noticeably incorrect after the first bounce off the interior of a closed object. RMAN-16374
- Lights inside objects with homogeneous single scattering in PxrSurface will not compute the correct shadows. RMAN-16367
- Due to differences in how XPU computes derivatives for normals, XPU may compute different results from RIS for bump mapped subdivision surfaces in areas of highly concave curvature, combined with a high bump scale. This happens especially when the bump mapping cannot reasonably approximate the displacement. Note that this difference does not occur with displacement. The issue can be ameliorated by reducing the bump scale. RMAN-21977
- Please refer to the XPU section of the documentation for a more detailed current list of limitations.
RIS and XPU
| Warning |
|---|
The Image Tool is currently unable to read OCIO v2 configurations and is locked to the $RMANTREE/lib provided configuration. If you have a v1 config you would like to use set the environment variable IT_OCIOV1. |
- Color Management: Although we have upgraded to the VFX Reference Platform 2023, there are still color management limitations:IT does not support OCIO 2.0 configs yet. RMAN-19921
- MaterialX: Material layering is not supported. RMAN-20365
...