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- Shading
- PxrUnified integrator does not yet support all the standard rendering features.
- <primstr:nameofvalue> substitution of data from a constant primvar or user attribute on an object for dynamic filename substitution is not yet working for the gettextureinfo() OSL call.
- Using the ' . ' character in the handle for an OSL shader could cause unpredictable results during re-rendering.
- The RixTexture::TextureDerivatives calls always returns RixTexture::InvalidFile for non-texture-atlas files. This will be restored in 26.1.
- General rendering
- Load on demand procedurals are not supported anymore, all procedurals are now loaded immediately.
- RenderMan does not read point data from OpenVDB files.
- Per-Instance baking is not supported, only the reference instance.
- PxrBakePointCloud cannot directly render ptex.
- Sample + Display filter plug-ins do not have access to lighting services for light dependent effects, e.g. lens flare.
- Adding new mesh light on existing geometry during IPR results in double geometry.
- Motion blurred polygons do not motion blur normals when deformed. Use Subdivision meshes instead.
- When attempting to access an array primvar, you must first check the size of the array primvar and allocate the appropriate space. Not doing so may lead to a crash.
- Points and curves cannot be used as geometric lights.
- Analytical lights placed inside non-aggregate volumes may yield artifacts when made visible to the camera. As a work around, the light camera visibility should be turned off, and a geometry with a similar shape should be used (visible to camera, invisible to transmission and indirect rays), with the proper emissive bxdf.
- Indirect Path Guiding in the PxrUnified integrator causes a crash.
- Bridge Products:
- RfH: Soloing MaterialX Lama nodes in complex shading networks can give an incorrect result.
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