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Houdini Main Changelogs

21.0.680

Added support for 3ds Max 2027.

Wed. April 8, 2026
20.0.1400

In the HDK, removed uses of the deprecated std::shared_ptr::unique() method in favour of use_count() instead.

Wed. April 8, 2026
20.5.928

In the HDK, removed uses of the deprecated std::shared_ptr::unique() method in favour of use_count() instead.

Wed. April 8, 2026
20.0.1400

On Windows, added new hcustom --output_compiler_range option to output the range of compiler versions allowed for compiling HDK plugins.

Wed. April 8, 2026
20.5.928

On Windows, added new hcustom --output_compiler_range option to output the range of compiler versions allowed for compiling HDK plugins.

Wed. April 8, 2026
20.0.1400

In the HDK, removed uses of the deprecated std::shared_ptr::unique() method in favour of use_count() instead.

Wed. April 8, 2026
20.5.928

In the HDK, removed uses of the deprecated std::shared_ptr::unique() method in favour of use_count() instead.

Wed. April 8, 2026
21.0.680

In the HDK, removed uses of the deprecated std::shared_ptr::unique() method in favour of use_count() instead.

Wed. April 8, 2026
21.0.679

Attempt to fix startup crash when using Houdini with Prisms Pipeline along with the Space Mouse.

Tue. April 7, 2026
21.0.679

Fixed an issue with hkey where the login dialog for the users sidefx account and the license server login looked identical resulting in confusion for users.

Tue. April 7, 2026
21.0.679

Fixed a compilation error when using some versions of XCode.

Tue. April 7, 2026
21.0.679

Backport r533598 Layout LOP:

Fixed a bug where prototypes in the stage would not load if the hip file was re-opened. This was because the string parm that is used to load the assets wfrom scratch was not being updated when the prototypes changed.

Tue. April 7, 2026
21.0.679

Fixed an issue in the animation editor's box handle and retime tool, where keys could collapse to a bad value if there are multiple channels of the same name and the paste mode is "using channel names".

Tue. April 7, 2026
21.0.678

Disabled re-import of HDAs during PCG generation as this may cause Unreal to crash.

Mon. April 6, 2026
21.0.678

Fixed issue with the Preview Material COP losing its displacement if the node is renamed.

Mon. April 6, 2026
21.0.678

Fixed a bug with python model haio where it was using the wrong alias of SSLProtocol.

Mon. April 6, 2026
21.0.678

Internal update in preparation for next release.

Mon. April 6, 2026
21.0.678

Removed the "Controls..." button from the Image ROP.

Mon. April 6, 2026
21.0.677

Add functions to RV_Instance to request extra extensions and features to be enabled on the Vulkan Device created and used by the Vulkan viewport, which can be used by HDK plugins

Sun. April 5, 2026
21.0.677

Backport for r533442 Stage Manager LOP: Fixed a bug where renaming a prim from an input node caused the prim Kind to be removed Bug: 155390

Sun. April 5, 2026
21.0.675

Backport for 533385 Layout LOP bugfix: Fixed an issue where changing a brush parm would bring back deleted geometry after the hitting Reset All Changes. Bug: 153912

Fri. April 3, 2026
21.0.675

Backport for r529827 Fixed bug in Layout LOP state where onInterrupt() was causing the handle to reset to origin.

Fri. April 3, 2026
21.0.675

Backport for r529816

Layout LOP state update: Fixed bug where parent class's onExit() was not being called - causing failure to write overrides to delta geo

Fri. April 3, 2026
21.0.675

Backport for r528485

Layout LOP bug fix: Fixed an issue where generating the preview of an added prototype while invoking a brush causes subsequently added prototypes to not register correctly. This caused a 'modulo by zero' error while indexing from the list of prototypes in the working set.

Fri. April 3, 2026
21.0.675

Backport for r528403 Layout LOP: Fixed an issue where the 'Add to node' button on the asset catalog wasn't working Fixed an issue where deleting a node with prototypes was throwing a python error Other minor performance improvements

Fri. April 3, 2026