Houdini Main Changelogs
| 21.0.727 | Fixed a bug where Karma Fog Box LOP produced undefined results in render when 'Noise' toggle is enabled. |
Mon. May 25, 2026 | |
| 21.0.724 | Fixed a bug in Camera Edit LOP where assigning a lens shader using "Lens Shader VOP" parameter (under Karma tab) had no effect. Note that the fix only applies to newly created Camera Edit LOPs. |
Fri. May 22, 2026 | |
| 21.0.724 | Fixed potential hanging in both CPU and XPU when rendering volumes, particularly when a ray originating from far far away intersects the volume. |
Fri. May 22, 2026 | |
| 21.0.724 | Fixed an issue where the pixel inspector wouldn't read values in some areas when using a render region with Live Render. |
Fri. May 22, 2026 | |
| 21.0.723 | Fixed a performance issue when Karma dealt with a very large number of lights. |
Thu. May 21, 2026 | |
| 21.0.723 | Updates to Karma camera tint will now properly trigger a sync with the renderer. |
Thu. May 21, 2026 | |
| 21.0.722 | Due to bug fixes in outlines, crease-based and contour-based detection methods may produce different looking results when outlines on an object is enabled but respective detection method is disabled and vice versa. |
Wed. May 20, 2026 | |
| 21.0.722 | Fixed erroneously generated outlines in cases where:
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Wed. May 20, 2026 | |
| 21.0.722 | Fixed a potential crash with nested instancing of volumes when an instancer has zero instances. |
Wed. May 20, 2026 | |
| 21.0.722 | Fixed potential crashes when unpacking packed USD primitives for meshes with invalid subdivision crease attributes. |
Wed. May 20, 2026 | |
| 21.0.722 | Fixed load warnings for the Shot Output HDA. |
Wed. May 20, 2026 | |
| 21.0.721 | Improved PDG Async Importer performance. |
Tue. May 19, 2026 | |
| 21.0.721 | Unreal 5.8 compatability fixes. |
Tue. May 19, 2026 | |
| 21.0.721 | Changes to RV_Instance initialization, to allow Extra Extensions to be added at later point in startup. If new extensions are requested after the instance is created, but before the viewport is initialized, the instance will be re-initialized to include all extensions. |
Tue. May 19, 2026 | |
| 21.0.721 | Fixed the TOP status bar work item selection menu so it can only be scrolled when the menu is open. This prevents accidental changes to the selected work item in the menu when using the mouse wheel to zoom the network editor, which could trigger a recook of displayed nodes that use work item attributes. |
Tue. May 19, 2026 | |
| 21.0.720 | Added a console variable Houdini.GarbageCollection that can be used to enable/disable the plugin's explicit calls to Unreal's Garbage Collector. |
Mon. May 18, 2026 | |
| 21.0.720 | Fixed an issue where custom instancer values would not be set correctly when using packed primitives. |
Mon. May 18, 2026 | |
| 21.0.720 | Fixed baked actors not being recentered correctly. |
Mon. May 18, 2026 | |
| 21.0.720 | Reduced schedular timing, improving performance. |
Mon. May 18, 2026 | |
| 21.0.716 | XPU: improved error reporting when CUDA NVML library fails to load |
Fri. May 15, 2026 | |
| 21.0.716 | Due to bug fixes in outlines, depth-based and contour-based detection methods may produce different looking results when objects with outlines enabled interact with objects with outlines disabled. |
Thu. May 14, 2026 | |
| 21.0.716 | Fixed a bug in outlines where depth-based detection may erroneously draw in lines over objects with outlines disabled that's in close proximity to objects with outlines enabled. Also addresses the issue where objects with outlines disabled always used random ID for contour detection, which prevented users from removing unwanted outlines on objects with outlines disabled using user-defined IDs. |
Thu. May 14, 2026 | |
| 21.0.715 | XPU: fixed a gsplats SPH transform rendering bug |
Thu. May 14, 2026 | |
| 20.0.1436 | Add missing documentation for KARMA_ALBEDO_AOV_DIFFUSE environment variable. |
Thu. May 14, 2026 | |
| 21.0.716 | Fixed Poly Frame tangent frame style of the input geometry in COP Preview Material SOP, to be linked to the MikkT Tangent Space toggle. This fixes render mismatch between VK and Karma rendering of normal maps. |
Thu. May 14, 2026 |