Support the non-MaterialX version of the USD Primvar Reader material node in HoudiniVK, since there have been several cases of materials using that node in MaterialX networks instead of the Mltx USD Primvar Reader.

Fixes a regression with RBD Material Fracture SOP's concrete fracture with chipping.

Updated the Terrain Desktop radial menu and the Terrain Tools shelf to use the new HeightField Erode 3.0 node.

Support fallback values for the Mtlx USD Primvar Reader node in viewport materials. Previously only default values from Mtlx Geometry Property was supported.

Fixed the incorrect info in the help card, regarding the inputs of the Mtlx Switch VOP .

Fixed a crash in Edit Material Properties LOP when editing a USD shader that has source code rather than an ID.

Add support to the selection set python API for setting set colors with a hou.Color object.

Fixed a bug in the RBD Material Fracture SOP's concrete fracturing which would assign the wrong name to detail fractured pieces with the Connectivity Partition parm set to None, when named source pieces were made of multiple disconnected pieces.

The Scene Graph Tree once again shows the activation state of instance proxy (and prototype) prims.

Fixed a bug where the Select Visible Only option wouldn't work when doing point box-picl selection. Caused by pick shader being misconfigured to read from the depth buffer

Adding the standard "Resbuild Renderer-Specific Parameters" menu item to the Portal Light LOP.

Fixed position coordinates being incorrectly generated for the Layer to Points COP.

Fixed a bug where switching between Karma CPU and XPU might generate invalid textures, causing pink textures to show up in the viewport.

Fixed a viewport MatX shader generation bug when two different hex tiling nodes were used in the same shader.

Dictionary attributes are serialized into .vdb metadata as dict_ prefixed string data. Likewise, dict_ prefixed strings are extracted as dictionaries. This allows the new volvis dictionary attribute to round trip through .vdb files.

Updated Electra to include the head and neck in the skin selection controls.

Building VDBs in COPs when GPU is in bad state will error rather than crash.

Fixed an exception in the APEX Animate state that would be thrown when pre-highlighting a skin selector that did not have a corresponding control.

Changed the type of the APEX Animate viewer state's start and end frame parameters in the Bake tab from floats to integers.

Use @fstart/@fend instead of $FSTART/$FEND in several LOP default parameter values to prevent some unnecessary recooking of these nodes when the frame range changes (Configure Layer, Scene Import, and Edit Context Options nodes were affected).

Added color parameter to most of the autorig components and fixed layout of the parameters on the components. Fixed the parenting on the neck component and updated the lookat component.

Fixed a bug where capturing Pose Library poses with the Capture Thumbnails option enabled would freeze Houdini if inside a LOPs sopcreate node.

Backported a ROP fix from 21.0 to address a performance issue with ROP dependency processing.

Default Maximum Resolution on the Crop COP changed from 8092 to 8192.