The USD Render ROP now properly populates the Render Settings drop down menu when a LOP node is connected to its input. Previously the LOP Path parameter would be used to generate the list of render settings prims, which is incorrect because a connected input supercedes that parameter.

Changed options for exporting layers from Unreal to Houdini to allow more control over which landscape layers are sent.

'Add to Asset Gallery' on Component Output LOP no longer adds an additonal entry for the main asset, when variant layers are used.

Fixed excessive memory usage with volumes containing multiple fields when rendering offline.

Fix a MaterialX shader generation crash in the viewer when the surface shader node isn't recognized.

In Feather Deform & Feather Procedural:

Added transfer of velocity (taking into account both linear velocity v and angular velocity w) from the deforming surface.

    Added a 'Preserve Names of Shape Primitives' toggle to the ROP FBX node to    remove the type and object count normally added as a suffix to the    name of shape primitives on export. This includes polylines as well as Bezier    or NURBS curves and surfaces.

Fix a bug in the Curve state where moving points with grid snapping enabled in 2D orthographic views would reset the component of the point's position in the view direction to 0.

Fixed potential crashes in the PolyCut SOP from edge groups being left in an invalid state when cutting based on an ordered group

ROP GLTF Output and ROP GLTF Character Output nodes now support adding additional textures to the exported file, making it possible to add textures not present on the principled shader.

XPU: fixed a texture artifact that could occur on Optix device with non-pow2 resolution textures

Fixed a bug where enabling backface or frontface culling on a flat ribbon curve would unexpectedly turn it invisible depending on its tangent direction.

String parameters with tag "unreal_ref" have an updated UI in details view which matches native UE5 object picker, which previously missed buttons to navigate to the currently selected object and to use the currently selected object in the Content Browser.

Fixed a bug where point meshes would fail to write to motion or velocity AOVs.

Button strip parameters now work correctly in the details UI.

Fixed a bug where subd or displacement may fail to apply (or crash on XPU) with animated visibility if rendering multiple frames within single process and the mesh was set to invisible on the first frame.

Fixed the disable when conditional on the exclude parms of the prune node, etc, to point to the correctly prefixed enable# parm (ie excludeenable#)

Fields in parameter UI will now remain focused after a HDA is cooked, making it possible to edit and navigate the Unreal details UI using keyboard only.

XPU: fixing an Optix-only bug with MtlxPower node and negative base values

Improvements and bug fixes for ramp parameter details UI. Ramp curve editor can now be opened in an external window for easier use.

Add Quaternion callbacks and transform::MultiBlend to APEX.

Fixed bugs in ch::ChannelsFromPrims and ch::ChannelToPrim which prevented them from working properly.

Fixed hanging in Houdini related to Python SOP nodes. For example, Houdini would hang when cooking Python SOP nodes from Houdini Engine Session Sync, or when a background thread tried to call into HOM while Houdini cooked Python SOP nodes.

The fix required restoring old behavior in Python SOP nodes that unfortunately reintroduces an old hang, one at least that is limited in scope. The old hang occurs when Python SOP nodes execute multi-threaded code that calls into the HOM `hou` package from separate threads. If you wish to run such code in Python SOPs, then you can set `HOUDINI_ALLOW_PYTHON_SOP_MULTITHREADING=1` in the environment with the caveat that you may encounter other hangs as detailed above (i.e. cooking Python SOP nodes from Session Sync).