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This new release of RenderMan for Houdini 23 (RfH), includes a number of new features to address feedback as well as many improvements to RenderMan for Houdini workflow and performance. Many parts of the plugin have been rewritten to improve integration into Houdini and simplify your experience

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"The Unsullied" by Dylan Sisson, rendered in RenderMan for Houdini

What's New

INTERACTIVE RENDERING

Now you can render through all stages of your pipeline! From modeling to final renders, RenderMan is designed to give you immediate feedback. By skipping the export of a scene to RIB, artists can get an immediate look at their work in full ray traced mode and continue to interact and make changes without needing to restart the render.

HOUDINI CONTROLS

Care has been taken to use the standard Houdini controls and menus when possible. Your options for light linking, grouping, and more follow the workflows you've known from Houdini.

THE PRESET BROWSER

The Preset Browser allows you to import and export materials from both Maya and Katana's Preset Browsers, simplifying asset sharing and scene management.

TEXTURE MANAGEMENT

The Texture Manager now parses your scene and prepares the textures for you automatically! Additional options let you set global rules for processing.

CENTRALIZED CONTROLS

The ROP node has been reorganized and old options removed, reducing your choices to make images to the important controls you use every time.

AND MANY MORE...

IMPROVED HDA CONVERSION

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INTERACTIVE OPTION EDITS

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PDG SUPPORT

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AND MANY MISC CHANGES & BUG FIXES...

• Created dynamic array node that allows integer inputs. This node replaces the buildarray node that caused warnings when connected to utilityPattern of PxrSurface. .
• Added GL tags to bxdf nodes for visualization in the viewport. 
• The Houdini node path is now used as the RenderMan object identifier for rib debugging. 
• No longer propagate non-fatal rendering errors to the ROP node. RenderMan errors are now considered warnings on the ROP node.
• Initial rendering now obey crop parameters.
• Corrected NURBS surface orientation.
• Added MatteID users parameters to RenderMan spare parameter tab for easier access.
• support for ris_OSLshader
• Null node can now represent a coordsys with it's node path.
• Created sun direction handle for PxrEnvDayLight.
• mesh light geometry no longer needs to be included in candidate lights to illuminate
• auto headlight wouldn't be created when doing render region in the viewport.
• Added support vector3, vector4, matrix4x4 parameter script_ritype tags.
• Deprecated PxrManifold3DN.
• force matte should send to the renderer regardless of display toggle or force object
• Fixed a bug on linux where Houdini could crash if rendering to 'it' after having rendered in the Render View.
• "View Selected RIB" menu tool only works in versions 17.5.229 and later.
• always set displacement bound
• fix extraneous warnings created when rendering motion blur on alembic geometry imported into houdini.

• a bug that prevented the use of DWAa and DWAb EXR compressions has been addressed.

  When RenderMan 23 is loaded, RenderMan 21 is disabled

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 inputsAuto camera creation for IPR
• RenderMan clipping planes
• If a light instance's master is disabled, the first render/update will still show the master

Known Limitations

• Tractor Integration
• Rendering with Mantra lights or VOPs not possible
• Bypassing shader nodesRendering with Houdini VOPs
• Auto camera creation for IPR