Address a potential reentrancy issue when reading data from the same hda in multiple threads.

The Unpack USD SOP can now transfer groups when unpacking.

Problem with hou.GeometryDrawable in /obj [SESI #92420]

• Advanced and text drawables can now render in the OBJ/DOP/LOP context.

Missing Houdini Package path entries [SESI #95857]

• Fix a string usage issue that prevented expressions to evaluate properlywhen loading a package.

Fixed missing UV boundary display in the viewport.

The Generic Generator TOP now has an additional set of parameters for explicitly specifying work item output files.

Fix Tab menu inside CVEX Builder in Material Assign LOP.

The Output Images option in the Flipbook dialog is now saved as part of the defaults and also to the hipfile along with the rest of the options.

The Generic Generator TOP now supports caching, when using the command builder parms. Any arguments specified as output file paths are added as expected outputs on the work item. If the file does not already exist or the cache mode is set to Write Files, the work item cooks normally and the file path is validated once the work item finishes cooking.

Fixed a display LUT issue with log-sampled OCIO color transforms which luminiance-shifted the image towards black, most noticable in near-black areas.

Add HOUDINI17_COMPATIBILITY environment variable for old cracktransform behaviour prior to 17.5.320 which can result in better (but equivalent) results by having less negative scale values.

Fixed a regression in packages when setting a path variable.

Fix an error when calling PyScheduler.submitGraphAsJob from a non-graphical session.

Add self._verbose to PyScheduler base class, which is used by self._verboseLog() to limit logging output.

Fixed an issue where performance monitor miscalculated time in "HQ light passes draw."

File Remove node: replaced the "Set Deleted Files As Output" toggle with a menu that provides greater control over how the outputs of the work item are set.

Fixed bug that was causing terrain layers specified by the unity_hf_terrainlayer_file attribute to not be imported.

This fixes several issues when resolving the HOUDINI_PACKAGE_PATH keyword during the load of package files.

These new package features have also been added:

• New support to define environment variables with a default value.A variable formatted as ${VAR-DEFAULT_VALUE} will expand to DEFAULT_VALUEif VAR is unset, otherwise it expands to the value of VAR.
• Defining custom path variables is now supported.

Fixed an issue on the GLTF SOP causing vertex normals to import incorrectly.

Fix a bug in the localscheduler total slots calculation which could round down to zero slots when Houdini had access to < 4 cores.

Fix a bug which prevented HARS from loading HDK plugins on Linux. Use RTLD_GLOBAL when loading HAPIL library.

The "Delete All Attributes" toggle on the Attribute Delete TOP now correctly respects the "Delete When" condition. When the condition is false, no attributes will be deleted. Previously the condition was incorrectly ignored in the specific case of deleting all attributes.

Added "Copy Inputs to Outputs" option to Attribute Delete.

Reorganized some of the scheduler code to improve logging. Also added PDG_BATCH_POLL_DELAY and PDG_RELEASE_SLOT_ON_POLL to pdgcmd to control polling frequency and use of acquire/release RPCs for batch work items.

The Alembic ROP now exports additional UV attributes as indexed attributes.