The Instancer LOP now respects the "type qualifier" (e.g., "position", "normal", etc) more consistently when converting SOP attribute data to USD.

Bumped the HDK ABI version due to addition of volume filter properties in BRAY_Types.h.

Fixed a bug with subd meshes where a large discrepancy between the sizes of neighbouring faces could lead to under-tessellation and potentially cause faceting or distortions in attribute evaluations.

Bumped the HDK ABI version due to a change in the signature of GABC_Util::getObjectList() that changes its ABI but necessary to avoid a potential race condition. The caller now provides storage for the returned paths.

Fixed a bug where emission inside transmissive object was not affected by absorption.

Bumped the HDK ABI version due to a new default parameter in the signature of GUcopyAttributesFromSource(), GUcopyAttributesFromTarget(), and GUupdatePackedPrimTransforms() that changes their ABI.

Bumped the HDK ABI version due to a new default parameter in the signature of GusdGU_USD::AppendExpandedPackedPrimsFromLopNode() that changes its ABI.

When creating a new Scene Import node, the `prefixabsolutepaths` parameter will be enabled to better support cases where SOP geometry has multiple root-level `path` attribute values.

Scene Import is not configured to default to convert height fields to meshes when importing.

The Karma ROP is now internally configured to convert height fields to meshes for rendering.

Bumped the HDK ABI version due to a change in the size of GU_LinearSkinDeformer.

When creating a new Karma ROP, the internal Scene Import nodes will be configured to better support cases where SOP geometry has multiple root-level `path` attribute values.

Fixed a bug where enabling Instantaneous Shutter on Render Settings (or disabling Motion Blur toggle on Karma Render Settings LOP) would have no effect on volume velocity blur, both CPU and XPU.

Fixes some bugs in Heat Geodesic SOP and Distance Along Geometry SOP with Heat Geodesic mode where calculations were incorrect for multiple geometric components and distance values for source points were nonzero. Hence, results will be numerically different but improved.

VDB 9.1 updated to add patches to fix the double-application of stolen tiles in VDB Merge SOP and ensure islands in VDB Extrapolate have background value, not max float.

Due to a bug fix in MaterialX mix node, the mix value will be interpreted differently (complement of old value) when using the mix node for surfaceshader, displacementshader, volumeshader, or color4 data type.

Added safety clamps to the Attribute Fill SOP (Minimum Edge Length and Minimum Speed parameters). These values improve stability of the solution, but may also change results. Setting these parameters to 0 should produce the same results as before.

Due to removal of dicing limitations, displacement or subd on a large face with closely zoomed in camera may render differently.

Fixed a bug with Attribute Adjust Vector not randomizing lengths when set to only adjust length.

The Connect Adjacenct Pieces SOP will no longer create a pscale attribute when in connect points mode.