Make further file system performance improvements for HOUDINI_VDB_FORCE_STREAM_SAVE by increasing its buffer size to 128 KB blocks.

Add HOUDINI_VDB_FORCE_STREAM_SAVE environment variable. When enabled, this forces .vdb files to be saved via a file stream that disables the ability to perform delayed loading on the saved .vdb files. This can improve file write performance by avoiding file seeking. Notably, Qumulo file systems suffer from this (but not Isilon file systems).

Fixed an issue with PDG throwing an exception on initialization when the `future` package is installed on the Python path.

Fixed thread safety issue when calling HAPI_IsSessionValid from multiple threads.

Fixed an issue where the output from HAPI was not being redirected to the Output Window properly.

Fix an issue where context option changes might not cause nodes to recook when first loading a hip file with delay-loaded HDAs.

Added support for setting an explicit alpha value on a netbox.

Modified hython so that it does not preconfigure the Qt environment by setting QT_PLUGIN_PATH and QT_QPA_FONTDIR if those variables already exist in the environment. This enables users to specify their own Qt environment to use in hython instead of the one in $HFS.

Fixed a warning when using landscapes with the old Unreal input system.

Fixed a crash during cooking if an HDA input straddles a world partition boundary.

Limit the number of Landscape Splint control points input from Houdini to Unreal to 1000. This prevents a crash in Unreal when saving a map with a high number of control points.

Fixed a crash with the File COP when loading EXRs with overscan.

Fixed a PDG bug where non-graphical jobs submitted to Deadline failed when executed on machines without GPUs.

Fixed an issue where some versions of the colormap/rawcolormap functions weren't handling variadic arguments properly. This may cause results of these functions to change if there were variadic arguments in use before.

Added a preference to disable the syntax highlighting and path completion for primitive pattern parameters. Having this option turned on can result in pauses when editing parameters caused by USD stage recomposition.

Added support for a more accurate/precise LOP point instance selection string format (`/instancer[instance_index:/path/to/selected/prototype]`) which can be enabled by setting the HOUDINI_PROTOPATHS_IN_INSTANCE_SELECTIONS environment variable to 1.

Mantra will try to detect corrupt .ifd.sc files better and fail, rather than silently exiting.

Fixed a crash when a landscape is input to an HDA and the landscape has a missing layer info on a paint layer

Fixed picking and selection highlighting in the LOP viewer when using a render delegate which delivers primid/instanceid AOVs to the viewer as raw OpenGL texture ids.

Fixed SceneViewer.setOCIODisplayView() when changing both the Display and View, and the new View didn't exist in the previous Display's list of Views.

Fixed issue where Component Output thumbnails wouldn't render to paths with spaces.

Added a new attribute unreal_landscape_layer_normalize to control landscape normalization. Fixed deprecrated non-weight layer attribute using edit layer instead of target layer.

Fixed an issue where Houdini Static Mesh components would not be deleted when recooking.

Fixed an issue where collision-only meshes were still visible in the scene.