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• Constant folding in patterns: There remains an issue where we are not properly constant folding input into OSL patterns in special combinations, causing a rendering failure.
• OSL Patterns:
  • <primstr:nameofvalue> needs to be implemented as a way of specifying primvar references within dynamic filenames.
• Several minor shading differences between RIS and XPU
• Out of Memory crashing: If the GPU runs out of memory, XPU will crash.  The intent is that we will be robust to crashing in this case in a future release and will instead stop rendering and issue a warning to the artist.
• Nested instances will render, but if you are using attribute variation to vary materials within the nesting, the results will be incorrect.
• If you update a texture while the renderer is running, XPU may not update the texture.  If this happens, restart your render.
• If you stop interactive rendering while textures are still being made, sometimes you will get a crash
• RfM does not yet support batch rendering with XPU

• See the XPU section of the documentation for a further list of limitations.