Miscellaneous Changes

• The Viewer Plugins now support textutre maps with more than 4 channels
• instance.ID instances now output an object id
• The IntAttribute prmanSuppressMasterId turns off object ids on instance masters, enabling unique ids per instance
• Procedural string parameters which are empty are now correctly passed to the procedural as a single-quote-delimited empty string ("''")
• Volumes can now be enabled and disabled during live rendering
• The new light learning selection scheme option is available in PrmanGlobalStatements. This option is off by default to preserve old behavior initially
• If stats are enabled the filename and/or xmlfilename are now printed to the log as: "RenderMan stats xmlfilename: /path/to/stats/filename.xml"
• Diagnostic output has been streamlined
• Handles for shaders are now used instead of the generic "terminal.<type>" when building shader nodesRfK supports the new PxrCylinderLight.  The light is available in GafferThree using the shortcut '0'
• Aborting IPR renders on Windows no longer has a lengthy delay before returning control to the application
• RfK will now always report the number of threads requested of the renderer. Previously that message would only appear if the value had been overridden by Katana preferences
• The Katana scenegraph traversal time is now included in the Rendering stats under a new "Bridge" section. There is also an "Ops" section for displaying timers and counters from per-object "prmanStats" attributes
• Log messages have been standardized under the "RfK" namespace
• A missing RMANTREE variable is now logged as an ERROR instead of a WARN
• Output messages for loading from specific shader paths are now logged as INFO messages
• The messages "Loading RenderMan shaders..." and "RenderMan shaders loaded." have been removed
• Restored support for "instance.ID" implicit instancing for groups

Fixes

• Live render updates to the material.resourceVersions attribute on material locations are now respected
• Light filters and light filter references under a dome light with portals will now have the correct mute state
• The "exitat" checkpoint option will now work even if the "interval" checkpoint option isn't set
• primAttributes set on polymesh locations with facesets are now respected
• A live render edit that results in removing a parameter from an integrator's parameter list will now correctly revert the parameter to its default value
• RMAN_RIXPLUGINPATH and RMAN_SHADERPATH now correctly accept the ";" path separator on Windows
• Removed duplicated shader warnings when an OSL pattern was found on both the RMAN_SHADERPATH and RMAN_RIXPLUGINPATH.  OSL shaders will only be loaded from the RMAN_SHADERPATH
• Fixed a bug where motion blurred instance arrays with the instanceMatrix attribute defined as a DoubleAttribute would crash
• Live render edits to a mesh light will now work even if only the light location is enabled in the live render working set.  The one exception to this is deleting the mesh location
• Defining unique coordinate systems per instance should now work for leaf-level instancing (instance.ID)