Houdini Main Changelogs
| 21.0.619 | Fix framing in the APEX Animate viewport state for small controllers so that its center is correctly computed. Previously, it was slightly off center resulting in it not staying centered if you then tumbled around it. |
Fri. February 6, 2026 | |
| 20.0.1339 | Houdini now conveys the correct resolution to render delegates through the HdRenderPassState object, instead of passing it only through the render delegate's SetRenderSettings API. |
Fri. February 6, 2026 | |
| 21.0.619 | Fixed a bug where turning off the Enable Blendshapes display option for crowd agents did not reduce the VRAM usage if the agents had already been displayed. |
Fri. February 6, 2026 | |
| 21.0.619 | Fix controller framing in the APEX Animate viewport state to take into account its object owner transform. |
Fri. February 6, 2026 | |
| 20.5.867 | Houdini now conveys the correct resolution to render delegates through the HdRenderPassState object, instead of passing it only through the render delegate's SetRenderSettings API. |
Fri. February 6, 2026 | |
| 21.0.619 | Fixed a bug where using MtlX Chiang Hair Bsdf VOP would cause shader to fail to compile. |
Fri. February 6, 2026 | |
| 21.0.619 | Houdini now conveys the correct resolution to render delegates through the HdRenderPassState object, instead of passing it only through the render delegate's SetRenderSettings API. |
Fri. February 6, 2026 | |
| 20.5.867 | Fixed an issue with OpenEXR texture maps that might cause too many files to be open concurrently. With large numbers of textures, it was possible for the OpenImageIO texture cache to open too many texture files, leading to system instability. |
Fri. February 6, 2026 | |
| 21.0.619 | Don't print out missing hotkey warnings in the LOP viewer when there are custom kinds defined through the USD plugin system. |
Fri. February 6, 2026 | |
| 20.0.1339 | When using a SOP Import to merge into the existing active layer, the source SOP geometry would be completely re-parsed up to three times instead of one. Now this translation is only performed once. |
Fri. February 6, 2026 | |
| 20.5.867 | When using a SOP Import to merge into the existing active layer, the source SOP geometry would be completely re-parsed up to three times instead of one. Now this translation is only performed once. |
Fri. February 6, 2026 | |
| 21.0.619 | When using a SOP Import to merge into the existing active layer, the source SOP geometry would be completely re-parsed up to three times instead of one. Now this translation is only performed once. |
Fri. February 6, 2026 | |
| 21.0.619 | The rig::MultiBoneIK apex node now uses the pole vector to set the orientation of the first bone in the joint chain. This behavior is on by default now, since "usetwist" is set by default. It can be turned off by unsetting "usetwist". These changes required updating KIN_IKSolverParm::myTwistAffectorFlag to false and KIN_IKSolverParm::myOffsetFlag to 0.0. These were previously ignored by the constraint solver; however, KIN_Chain is exposed in the HDK, so these flags will also need to be set by client code which uses the constrain solver via the HDK. |
Fri. February 6, 2026 | |
| 21.0.619 | The rig::MultiBoneIK apex node now uses the pole vector to set the final orientation of the first joint in the output joint chain. This behavior can be turned off by unsetting "usetwist". |
Fri. February 6, 2026 | |
| 21.0.619 | The Autorig Builder will now use the updated tags from metahuman. |
Fri. February 6, 2026 | |
| 21.0.618 |
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Thu. February 5, 2026 | |
| 21.0.618 | Recipes: Fixes a bug where applying parm-data-dict to a node would reset any mutiparm instance parameters on the node, before the data was applied. |
Thu. February 5, 2026 | |
| 21.0.616 | The Color Correct COP has changed significantly to better reflect the old COP2 Color Correct:
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Tue. February 3, 2026 | |
| 21.0.616 | Fixed viewport slowdown when instanced lights are present but a different render delegate than HoudiniVK is used. |
Tue. February 3, 2026 | |
| 21.0.616 | Recipes: Fixes a bug that would error during recipe creation when the vop network doesn't have a 'constant' node type. |
Tue. February 3, 2026 | |
| 20.5.864 | Fixed a bug that could cause Houdini clones to immediately disconnect after starting up when the source hip file is large. |
Tue. February 3, 2026 | |
| 21.0.616 | Fixed a bug that could cause Houdini clones to immediately disconnect after starting up when the source hip file is large. |
Tue. February 3, 2026 | |
| 21.0.615 | Respect the 'Enable Background Image' parameter of the Camera object in the viewer. It was previously ignored. |
Mon. February 2, 2026 | |
| 20.5.862 | Ramp parameters now require focus when zooming. |
Mon. February 2, 2026 | |
| 20.5.862 | Ensure parameter choid selections are updated after a cook. |
Mon. February 2, 2026 |