• Fixed crash caused by previous backport of 5.4 fixes.
• Prevent potential loop if we loose the session while cooking/instanting.

Fix a bug in the Curve state with the xform handle active causing the T/R/E keys to exit the state and enter a move tool instead of switching the mode on the xform handle.

Karma Render Settings LOP no longer strips layers above layer breaks when merging render settings, products and vars.

Fixed a bug with Gas Resize Field DOP's handling of sliced fields.

Improved memory usage on displaced mesh.

Fixed an issue where apprentice was not behaving correctly for mantra.

Fixed viewer update of a SOP Solver sim when inside the solver.

Fixed NaNs and bucketing artifacts when per-component indirect bounce quality is set to below 1 under automatic convergence mode.

Add preliminary support for LODGroup in KineFX FBX exporter. Houdini now creates an LODGroup FBX node for mesh parent or joint nodes that start with `LODGroup` instead of previously creating a Null or Limb FBX nodes. There's still no support for specifying the LOD properties like display factor, etc. though, left as future work.

Fixed a bug in the Alembic ROP that caused it to export geometry from the connected node's first output instead of the one wired to the Alembic ROP.

Configure Prim node: Fixed bug where a failure to configure a prim will result in any subsequent child prims not being configured.

Document that the scrolllock is disabled by default in the keyboard chop help.

Render delegate-specific dialog scripts are now found using the HOUDINI_SOHO_PATH instead of the HOUDINI_PATH, allowing more control over how these parms are found without having to modify the full HOUDINI_PATH.

Fixed a bug where performance monitor caused some nodes to disappear.

Python HUD Handle - HUDs duplication bug

• Fix a problem where HUDs were duplicated after resuming volatile states like select or view.

Fixed a bug where the network editor crashed Houdini attempting to access invalid wires.

Hexahedrons can be created with the array-form of addprim() now.

Fix corruption of geometry that could occur if removing a point in VEX from an already degenerate hull, hexahedron, tetrahedron, or tribezier.

xyzdist and similar functions that access implicitly unwrapped geometry no longer crash if that geometry fails to exist.

The VoxelCubeProbe had an error in its pre-fetch for repeat & mirror modes, which showed up as artifacts in Volume Convolve 3x3.

.compAt and .entries for OpenCL snippets that bound to vector arrays would not take the tuple size into account and index/report incorrectly. They should now be correct.

Change order of operations to reduce the number of tests to see if display and render flags are the same, this can avoid surprising cooks when parameters have to be evaluated.

Fix crash when a non-snippet attribvop is part of an invoke graph; error instead as these require nodes that aren't present in the invoke graph world.

VEX set() function now has missing matrix2 methods that match the matrix3 and matrix methods, such as setting from arrays of vector2, etc.

Fixed issues with the audio in exported videos not being properly offset for the start frame of the exported video and not correctly accounting for any stretching done while adjusting for playback frame rate changes.