Deprecated Ri Calls

• RiEdits do not function

New Options

Deprecated Options

New Attributes

Deprecated Attributes

• Ri

Known Limitations

Interactive/Live Rendering Limitations

• RiEdits do not function, these are deprecated
• Camera edits do not update
• Changes to Presence do not update
• Motion Blur will disappear during interactive rendering with scene changes

RenderMan Pro Server

• 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.
• Instances are not supported for baking.
• 3d baking: no direct bake-to-ptex support.
• PxrBakePointCloud cannot directly render ptex.
• No RixPTC/pointcloud API (so PxrBakePointCloud cannot read ptc files).
• 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.Camera visibility changes are not respected during Live Rendering.
• For PxrUPBP, If the light source is inside a volume, that volume needs to be defined as Volume “box”
• For PxrUPBP, To get a volume caustic, the object casting the caustic needs to have higher intersectpriority than the volume.
• For PxrUPBP, Overlapping heterogeneous volumes are not working yet. (However, overlapping homogeneous volumes do work.) This will be resolved in the future.PxrPortal may yield artifacts when generating photons for PxrVCM / PxrUPBP. This will be fixed in a future release.
• 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 have mesh lights attached to them.
• 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.

Alpha Limitations

• Geometry: 

  • Full support of implicits
  • Blobbies
  • Dicing cameras
  • Face edits to RIB
  • Utilize smoothed normals
  • Displacement improvements
    • Watertight dicing speed
    • Cracks
  • Brickmaps

  Materials:

  • OSL completeness

  Volumes:

  • Pixar Studio feature – Aggregate Volumes
  • Soem bugs with results

  Lighting related:

  • Light Filter Linking
  • Lights in instances
  • PxrVCM (may have bugs and performance issues)
  • PxrUPBP remains experimental
  • Holdouts
  • Shadow collectors equiv to 21.x

  General features:

  • Crop Window support
  • Load on Demand
  • Procedurals not fully supported
  • Some baking features

  Performance:

  • Some performance issues remain

  Image creation:

  • Display and Sample Filters
  • Denoiser bugs remain 
  • dPdtime and motion vectors not correct

  Pipeline features:  

  • Checkpoint and recovery
  • Cryptomatte support (in progress)
  • USD direct read in RenderMan
  • Alembic material assignment