Fix CH_Manager.h in the HDK to work around a bug in gcc13 so this compiler can be used to build HDK plugins that include this header.

Hide deactivated lights from the light linker since it has no way to activate them.

Fix update issue when locking/unlocking a parameter in the light mixer.

Fix hotkey editor showing the Esc key assignment window when pressing enter in the search field.

Update Houdini's USD library to include the following fix:

• Avoid crash when writing USD to volumes mounted to NTFS folders

Fixed a potential crash in the APEX Character Deformation display option, along with a bug that could cause stuck geometry in certain situations.

Fixed an issue in the APEX Character Deformation display option where rigidly skinned packed primitives were displayed incorrectly if the nested packed geometry contained a boneCapture attribute.

Made level instances read only when not being edited. Fixes several bugs when using HDAs in level instance levels.

Fixed a couple issues with packed primitives in the Convert SOP. Nested packed primitives are now unpacked, and the unpacked geometry is now correctly converted to the specified primitive type.

Fixed a bug with Glow where the threshold parameter was not working as intended. This causes a slight change in behaviour which means older files will look a bit different.

Added Spline2 component. This version is updated to have better custom controls. It also now supports controls for squash and stretch and the ability to keep its length.

The Bullet solver's information about initially overlapping objects is no longer lost when solver resets, e.g. when resimulating an earlier frame after making a parameter change.

Fixed issues in the APEX ragdoll tool which could cause unexpected motion after changing a parameter on a previously cached simulation frame.

Added a new Attribute Classify TOP, which can be used to assign a numeric value for each distinct attribute configuration on the the input work items. The list of attribute values to consider can be specified either with a multi-parm list or an attribute pattern. A new "class" int attribute is added to each input work item -- work items with the same attribute values will have the same class number.

Fix an issue in the attribute paint state where if the geometry intersection failed, it could sometimes connect the stroke to the origin unexpectedly.

Added an Animation Clip parameter to APEX Scene Invoke to select which animation clip to use when evaluating the apex scene.

Reorganized the Curve state context menu to place items into submenus.

In the animation editor, qlinear() segments no longer have bazier handles.

On Windows, relax HDK compiler version check for the latest Visual Studio 2022 compiler update.

Fixed a crash in Poly Bevel 3.0 SOP when given atypical input topology, consisting only of points and lines.

Fixed an issue where a new landscape with a single height layer would not be placed into the correct Edit Layer.

Fixed a regression that caused an infinite loop setting landscape spline segment meshes by attributes.

Fixed an issue with Bullet's soft constraints which could cause unexpected rotation behaviour in certain situations when the rest length was non-zero.

XPU: Fixed a bug where camera clipping range didn't take effect when using a lens shader with any projection other than "Perspective" or "Orthographic".

Updated python state menu hotkey documentation for the new hotkey system.