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)

Fixes

• Adding locations that are children of /root during live render now works
• 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
• RfK will now correctly terminate the render on error locations
• Adding and removing portal lights from a dome during a live render is now correctly handled

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