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Miscellaneous Changes

  • Change default for option trace worldorigin to "camera". This solves issues with precision in large scenes where locations can be many units away from the origin
  • The IOR in PxrSurface has been raised to a max of 5
  • C and C++ deeptexture APIs and utilities have been restored but these are deprecated and will be removed in a future release

  • Fixed sample count is not supported by the renderer for mesh lights, the control is removed

  • Empty string (i.e. "") traceset is now the same as NULL or unspecified, this may resolve some issues with grouping and trace sets not operating as expected


  • A bug leading to incorrect normals on points with radius larger than 1 has been fixed

  • Issues with facevarying data on RiPoints have been addressed

  • Fixed an issue where GPU Denoise for sequences may crash
  • Fixed bugs in the denoiser's GPU mode that could lead to either crashing or black images
  • A slowdown for non-pretessellated objects with deformation motion blur and overly large displacement bounds has been fixed

  • A bug where the renderer failed to fall back to uncached presence and opacity when caching was requested on RiPoints has been fixed

  • Fixed a bug causing potential for render hangs when using coincident or nearly-coincident lights

  • Fixed a bug causing a small chance of hangs when using more than 32 lights


Interactive/Live Rendering Limitations

  • Crop window edits are restricted to fall inside the original crop window
  • Bucket order or size cannot be changed during live rendering
  • min and max samples settings cannot be altered during live rendering
  • Changes to Presence do not update when using the opacity cache option
  • Motion Blur will disappear during interactive rendering with scene changes
  • Displacement does not update on changes
  • Objects are not automatically re-diced during interactive sessions
  • Mesh lights cannot be interchanged as geometry without restart
  • Altering density of volumes does not update during IPR
  • PxrUnified may crash while making interactive edits when using Manifold Walk and/or Indirect Guiding.

RenderMan Pro Server Limitations

  • PxrUnified integrator does not yet support all the standard rendering features.
  • Meshlights cannot be instanced
  • Load on demand procedurals are not supported anymore, all procedurals are now loaded immediately
  • We do not read point data from OpenVDB files
  • PxrSurface back diffuse color is not output to the albedo color AOV
  • Analytical lights placed inside 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.
  • Using the ' . ' character in the handle for an OSL shader could cause unpredictable results during re-rendering.
  • Per-Instance baking is not supported, only the reference instance.
  • 3d baking: no direct bake-to-ptex support.
  • 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 (mesh) lights.
  • Deformation motion blurred volumes don't currently work with densityFloatPrimVar or densityColorPrimVar. You will need to use a PxrPrimVar node connected to densityFloat and densityColor instead.


    The Centos KDE style "Oxygen" installs a version of Qt and sets the user's environment variable QT_PLUGIN_PATH forcing "it" and LocalQueue to attempt to load an incompatible Qt library. Either avoid installing the Oxygen theme or unset QT_PLUGIN_PATH before running "it" or LocalQueue. Other KDE styles may also install this theme.