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This release of RenderMan for Houdini (RfH) 23, includes a number of new features and bug fixes that address feedback.

New Features in 23.6

Fixes

• fixed Fixed a bug when that was setting the Icon wrong icon path during args parsing.

• Fix Fixed file dependency path for RfH RenderMan TOP nodes.
• Light groups now work in light path expressions (no light selects) in Solaris.

• fix bug where renderman parameters were Fixed a bug where RenderMan parameters were being ignored inside locked HDAs.

• removing Removed single quotes in conditionalvis string in RfH. only double quotes or none are valid.conditional visibility string.

• Fixed incorrect math calculating velocity transform blur scale.

• Fixed channel references for domelight are not working with relative paths on the first frame rendering via hbatch. could be a complicated houdini bug, but can easily work around by getting the full path before setting the references. Fixed a crash in hdPrman  

• Fixed incorrect screen window calculation when pixelaspect=2

• Fixed incorrect types for bokeh settings. 

• Fixed transform calculations for blend and bone obj nodes and added support for subnet's outputobj parameter.
• Fixed bug that did not read time correctly to expand $F in string paths.
• Fixed bug where curves with certain bases would look wrong when motion blur was enabled and "width" was defined. 
• In Solaris - 
  • Fixed a bug where hdPrman would always specify the first field of a vdb file as the density field.
  • Fixed a backdoor workflow where display and sample filters are allowed to come through Hydra as shading nodes.
  • Fixed the "Render to MPlay" and "Render to Disk in Background" buttons on the RenderMan LOP.
  • Light groups now work in light path expressions (no light selects).
  • Fixed a crash that could occur when running in the usdview that ships with
  Solaris
  • Houdini if the camera was not created with Solaris and lacked certain attributes that we support for Solaris cameras.

• Fix incorrect screenwindow calculation when pixelaspect=2

• fixes to bokeh settings (incorrect types)

• fixes to curve motion blur in /obj and /lops
• fixing transform calculations for obj_blend, obj_bone
• Fixed a bug where vdb files with a first field not named density wouldn't render.
• fix bug that did not read time correctly to expand $F in string paths

Miscellaneous

• • Fixed a bug that caused some incorrect sample times when using more than 3 samples for deforming motion blur.

Miscellaneous

• Added support for pre- and post- render hooks via RFHhooks.

• Brought back PxrDebugShadingContext VOP/
• Improved motion blur support for in Solaris:

• add support for pre and post render hooks via RFHhooks

• bringing back PxrDebugShadingContext hda
•  Improved motion blur support for hdPrman in Solaris

  • Motion blur for meshes, curves, and point particles is now supported through a shared codepath.

  • There is On Render Geometry Settings node there's now a Motion Blur tab under the RenderMan Master Attributes on Render Geometry Settings node.

  • Velocity blur and enabling/disabling motion blur for objects is now supported through the Render Geometry Settings node.

  • Enabling/disabling motion blur works for transforms and geometry.

• Other changes in Solaris:

  • The camera now tumbles around the mouse cursor when rendering in Solaris.
  • Added baking options to the RenderMan LOP under the Rendering/Render tab.
  • The RenderMan render is now paused when the user switches to the GL renderer.
  • RenderMan's Xcpt messages now go to stderr.  They were sometimes getting lost in Solaris.

• Removed remove xform_motionsamples and geo_motionsamples from the RenderMan tab (geo and cam) because these are not RenderMan-only parameters and are were affecting mantra Mantra renders. Now you must manually add if you want to set these parameters on the object.

• emitting all renderman geometry primvars to alembics because RfH doesn't know what type is inside the packed alembic so we need to cover all bases.

• read Added support for shop_materialpath in alembic attributes. add bundle to rop to , but the material must be included in the RenderMan scene for the procedural to apply the material. Added a bundle parameter on the RenderMan ROP to force material export.

• Added back support for the Pause/Resume callbacks in hdprman
• improved Improved viewport lighting.
• read Read abcvelocityscale attribute to scale alembic velocity
• Added baking options to the RenderMan LOP under the Rendering/Render tab
• promoted parameters can have different names now

Known Limitations

• .
• Added acceleration blur support.

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