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Additional Changes


Miscellaneous Changes

  • PrmanObjectStatements conversion script will now convert legacy "prmanStatements.attributes.shade.shadingrate" to "prmanStatements.primAttributes.dice.micropolygonlength"
  • Added support for "hole" tag via "geometry.holyPolyIndices" attr in "subdmesh" locations
  • Change default for option trace worldorigin to "camera"
  • New Preset Browser nodes are now correctly set as editable
  • PrmanPresetBrowser can now directly assign assets to selected scenegraph locations. New asset nodes are now combined into a single, floating group for immediate addition to Katana recipe.
  • Preset Browser : Imported assets now have a built-in MaterialAssign which can be set or modified via the enclosing Group's CEL statement
  • Data window and display window are now supported for DeepEXR outputs
  • The "autocrop" option is now available for raw OpenEXR outputs
  • The user:maxtextureresolution and user:texturemipbias attributes are now exposed in PrmanObjectStatements
  • Materials can be referenced inside procedurals via their scenegraph location
  • Live render edits to the rendererProcedural attribute are now supported
  • Support relativeScopedCoordinateSystems entries that don't start with '/' (the format produced by PxrUsdIn)


  • Fixed bugs in legacy attribute conversion op which could lead to incorrect values
  • Preset browser import no longer fails on bad parameter data. Instead a warning will be printed and the parameter will be ignored
  • RfK will now correctly terminate the render on error locations
  • Muting the parent of a light filter now correctly mutes all light filter references
  • Single-element instance array primvars are now handled correctly
  • Fix crash in Viewer and Hydra Viewer when muting a light with a light filter reference that has "Lock Size to Cone Angle" enabled
  • Adding and removing portal lights from a dome during a live render is now correctly handled



Known Limitations


Live Rendering

  • Creating a mesh light from existing geometry will duplicate the geometry in-render. Restart the render to remove the duplicate.

  • Adding a portal light to a dome light doesn't delete the dome light
  • Cannot change a geometry primitive type during live rendering (e.g. from NURBS to polymesh)
  • Edits to mesh light parameters require that the geometry location is enabled in the live render working set
  • When assigning a material to a Scene Graph location, that location must be enabled in the live render working set

  • Cannot create new volumes or enable existing-but-disabled volumes during live rendering.

  • The Katana Viewer will crash when muting a light with a light filter reference with "Lock Size to Cone Angle" enabled


Katana Limitation

  • When rendering to "it" from Katana, do not stop the render from "it", abort the render from Katana. Your Katana session may freeze for a time if you abort from "it". If you make this mistake you can restore Katana to operation by terminating the prman render process manually. This will be fixed in a future version. You can also avoid this entirely by rendering to the Katana Monitor.
  • We do not receive live render edits from Katana for nodes added at the end of the node graph, right above the Render node.  If a no-op node (e.g. Merge) is inserted above the Render node and the node is added above that then the edit is received.
  • Any live updateds will cause interactive motion blur to be disabled. The render must be restarted.
  • Support for light arrays of mesh lights is coming in a future version of 22
  • Render is not correctly terminated when errorHandler = 'abort', this only aborts traversal, not the render
  • PRMan error handlers are not fully supported yet.
  • Instanced lights with filters using the "Light Filter" coordsys have an incorrect transform. The workaround is to promote the light filter to a shared light filter using a light filter reference.
  • There are a few live render limitations in Katana 2.6 that have been resolved in Katana 3.0 based on the improvements to 3.0, typically limitations with live working sets and adding/deleting locations in 2.6