Houdini Main Changelogs

21.0.699

Additional fix to the bug (from 21.0.693) where an instance that's very close to camera may be incorrectly determined to be offscreen and passed over for best candidate for dicing.

Mon. April 27, 2026
21.0.696

Fix undo regressions introduced from 22.0.288 due to the introduction of HOUDINI_UNDO_IDLE_TIMEOUT.

Fri. April 24, 2026
20.5.943

Added a Cache Current Frame Only caching mode to the SOP Crowd Import LOP

Thu. April 23, 2026
21.0.695

Added a Cache Current Frame Only caching mode to the SOP Crowd Import LOP

Thu. April 23, 2026
21.0.695

Fixed a bug in the APEX Animate state where removing a constraint would cause the scene to freeze up if the constraint was not animated on every layer.

Thu. April 23, 2026
21.0.695

Fixed a bug where Live Render LOPs inside subnetworks could cause Houdini to crash.

Thu. April 23, 2026
21.0.694

The Vellum and Otis solvers now handle negative frame numbers without a slowdown from rebuilding internal collision detection data structures.

Wed. April 22, 2026
20.5.942

Fixed a bug where meshes could flicker in the viewport, when being drawn with a color visualizer

Wed. April 22, 2026
21.0.694

Fixed a bug where meshes could flicker in the viewport, when being drawn with a color visualizer

Wed. April 22, 2026
20.5.942

Fixed a bug where per-vertex decorations wouldn't be drawn

Wed. April 22, 2026
21.0.694

Fixed a bug where per-vertex decorations wouldn't be drawn

Wed. April 22, 2026
21.0.694

Fix crashes when using the Bake/Reduce channels dialog.

Wed. April 22, 2026
20.5.942

Fix crash that could occur when applying a detail Cd attribute to instanced prims

Wed. April 22, 2026
21.0.694

XPU: Fixed Time Offset Map effect in Physical Lens Shader. Previously the effect was completely ignored due to applying time offset incorrectly.

Wed. April 22, 2026
21.0.694

Backported USD fix for rare issue with Windows disk access.

Wed. April 22, 2026
21.0.694

Backported USD fix for material assignment being dropped on nested instances.

Wed. April 22, 2026
21.0.693

Fixed a bug with instancing diced mesh where an instance that's very close to camera may be incorrectly determined to be offscreen and passed over for best candidate for dicing.

Tue. April 21, 2026
21.0.693

Fixed a bug with instancing diced mesh where an instance that's very close to camera may be incorrectly determined to be offscreen and passed over for best candidate for dicing.

Tue. April 21, 2026
21.0.693

Add a new display option named "Instanced Light Limit", used to set a maximum count for instanced lights drawn in the viewport, which is separate from the normal light count.

Tue. April 21, 2026
20.5.941

Fixed incorrect enum class check in GeometryViewportSettings.guideFontSize.

Tue. April 21, 2026
21.0.693

Fixed incorrect enum class check in GeometryViewportSettings.guideFontSize.

Tue. April 21, 2026
21.0.693

Fixed bugs where the Cd attribute would display incorrectly for packed fragments and packed primitives

Tue. April 21, 2026
21.0.692

Backport for r535353 Paint Instances LOP: Fixed bug where adding an asset to the prototypes from a Fetch datasource would throw an error because it tries to connect an input to a node with no inputs

Mon. April 20, 2026
21.0.692

Collections in the Scene Graph Details and parm menus are now searched for using the collections path preference rather than a hardcoded "/collections"

Mon. April 20, 2026
21.0.692

Fixed issues with the Muscle Tension Lines SOP undo and deletion. Undoing a stroke will now return to the line drawing cursor. Also fixed bugs with Muscle Tension Lines SOP not reliably showing bones and the line ID not displaying when the parameter is first turned on. Additionally, clicking on a tab in the parameter pane now selects the corresponding line in the viewer state.

Mon. April 20, 2026