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• When RenderMan 22 is loaded, RenderMan 21 is disabled
• Support for pre-transforms, "keep position when parenting" parameter, and input independent transforms
• Allow automatic creation of intermediate directories for output display path
• Change to render shelf button for IPR rendering. Renders at current frame rather than frame specified by ROP and renders to mplay or "it" depending on your choice
• We override Houdini curve basis with RenderMan parameters
• Updated parameter ranges and default LPE expressions
• We now support User Color creation in RfH
• Invisible geometry is no longer evaluated for rendering, start up renders more quickly

• We now obey focal units

• Supply stereo offset and stereo depths parameters on the camera
• Alembic
  
  • Alembic xform motion blur now applied at SOP level
  • We now apply material or transformation overrides to packed Alembic archives
• Added autocrop option to openexr, deepexr, and tiff display options
• OSL options added in the ROP node, Batch OSL execution is defaulted to on
• pre/post render and pre/post frame script attributes should now work on RIS and denoise ROPs
• Renamed BUILDARRAY to DYNAMICARRAY
• Shader Shelf buttons create and populate PxrMaterialBuilder
• We now support multi-channel OpenVDBs
• Obey Object Tab's candidate lights/objects when starting IPR, but edits during IPR will restart the render session
• Improved naming and icons to avoid version confusion with prior installations
• Read shop_materialpath attribute on instances
• RfH now supports creating SHOP procedural nodes from args files

• Geometry with changing topology will motion blur correctly when velocity is present

• The master of instanced geometry can now be hidden using the usual Houdini display flag, without hiding all the instances
• Added an "As Archive" checkbox under the RIB tab of the RenderMan 22 ROP.  The RIB that is written is usable as an archive, via a PxrDelayedReadArchive procedural SHOP
• On versions of Houdini that support it, Mplay is now launched with the appropriate OCIO LUTs enabled
• Pxr Light colors are now reflected in the light color guides in the sceneview

• Instancing primitives

  • Point attributes set through AttributeWrangle nodes apply to instances

• The Capture RIB while rendering capability has been added
• Various Pxr Pattern nodes have had their user interfaces cleaned up and updated
• Simplified output and AOV creation in the ROP node
• Use Emissive Volumes as light sources with PxrVolume
• Enhanced Light Selection speeds up rendering for scenes with many lights
• Interactive rendering in the Scene View with Render Regions
• PxrSurface Layering
• AI Denoising from Nvidia in "it" (requires the Denoise option in the ROP node be turned on)
• Full integration with "it", interactive crop window and object selection
• Force candidate nodes and lights
• Auto light creation during interactive renders
• RIB output/batch rendering from RIB with VDB data
• Denoising of renders during batch processing now works as a separate ROP node
• Improved the user experience where light filters automatically reference VOP
• Added patterns to the submenu for VOP parameters
• Spare RenderMan parameter names have been changed
• .oso shaders found in $RMAN_SHADERPATH are automatically converted to otls, and stored in $HOUDINI_USER_PREF_DIR/otls/rfh_osllib.hda
• Added a node to support RenderMan procedurals
• Added autorender, cropwindow adjustment, and object picking from the "it" image tool
• Added support for interactive render regions in Houdini's Scene View window
• Custom SOHO parameters are no longer overwritten by RfH
• Versioned all new RenderMan 22 RIS nodes
• Added menu item to apply subdivide attribute to all all selected nodes
• Add time interest to shader networks
• Added ability to solo patterns in shader networks
• All materials should now be placed in "/mat" instead of "/shop" by default
• Preset browser can now import/export assets with OSL shaders
• Provide warnings when RMANTREE and RFHTREE are not setup correctly

Known Issues

• Phantom objects are removed from all rays, not just camera rays
• Applying undo of deleted nodes or collapsing to subnet may not work as expected
• Interactive Render Regions may require adjustment to start rendering
• Rewiring subnet indirect inputs
• Auto camera creation for IPR
• RenderMan clipping planes
• If a light instance's master is disabled, the first render/update will still show the master

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