Houdini Main Changelogs

20.5.921

Fixed a bug computing render dependencies for ROP subnets.

yesterday
21.0.673

Fixed a bug computing render dependencies for ROP subnets.

yesterday
20.0.1393

The Instancer LOP, RBD Destruction LOP, and Modify Point Instances LOP now correctly translate the 'w' attribute from radians per second to degrees per second when authoring the 'angularVelocities' attribute for point instancers. This conversion was already done by the SOP Import LOP

yesterday
20.5.921

The Instancer LOP, RBD Destruction LOP, and Modify Point Instances LOP now correctly translate the 'w' attribute from radians per second to degrees per second when authoring the 'angularVelocities' attribute for point instancers. This conversion was already done by the SOP Import LOP

yesterday
21.0.673

Avoid running shader with trace calls during geometry-light precomputation stage

yesterday
21.0.673

Fixed issues with needing to relogin every reboot and having to change server listing on each reboot.

yesterday
21.0.673

XPU: skips degenerate curve segments to prevent crash during rendering

yesterday
21.0.672

Improved FBX import performance when processing string attributes.

Tue. March 31, 2026
21.0.672

Muscle Properties Otis and Muscle Constraint Properties Otis SOPs now update muscle highlighting in the viewport as soon as a new multiparm tab is selected. The group and attribute list size is no longer hardcoded by the viewer state for these two nodes.

Tue. March 31, 2026
21.0.672

The Wedge TOP now supports changing how numeric wedge values are applied to the target node. Previously the wedge would always set the target parameter to an @attrib reference expression, however it's now possible to configure the node to apply values directly.

Tue. March 31, 2026
21.0.672

Fixed documentation for the HOUDINI_DEFAULT_LOG_SOURCES environment variable which wsa giving incorrect information about its default value.

Tue. March 31, 2026
21.0.671

.usdnc should show up in File choosers for USD files, allowing selection of apprentice files.

Mon. March 30, 2026
21.0.668

The Tissue Properties Otis SOP now outputs `fiberstiffness` instead of `solidfiberstiffness` if the Fiber Stiffness option is toggled on for the Core or Solid Layer. This means that the Otis Muscle and Tissue Configure SOP will now recognise fiber stiffness on tissue. Existing setups that had the fiber stiffness toggled on for tissue despite it having no effect will now produce a different, correct result.

Fri. March 27, 2026
21.0.668

Fixed a bug in karma CPU where LPE AOVs with expressions ending with 'O' (e.g. emission) that exclude certain LPE tag using `^` metacharacter would erroneously exclude object without any LPE tags.

Fri. March 27, 2026
21.0.668

Fixed a bug in karma CPU where LPE AOVs with expressions ending with 'O' (e.g. emission) that exclude certain LPE tag using `^` metacharacter would erroneously exclude object without any LPE tags.

Fri. March 27, 2026
21.0.668

Fixed a bug in the Otis Muscle and Tissue Configure SOP where the Muscle End Mask Threshold wasn't taken into account on the bones if they have a muscleendmask attribute. This can cause different results in existing files where the bones have this attribute.

Fri. March 27, 2026
21.0.668

Fixed an issue on Windows where upgrading hserver would often cause a reboot request.

Fri. March 27, 2026
21.0.668

Have Karma AOV VOP author attributes by the same names as Render Var LOP.

Fri. March 27, 2026
20.5.916

Fixed a bug in 'hitN_facing' ray import where normals facing away from viewer at grazing angles produce bad results.

Fri. March 27, 2026
21.0.668

Fixed a bug in 'hitN_facing' ray import where normals facing away from viewer at grazing angles produce bad results.

Fri. March 27, 2026
20.5.916

Fixed issue where filtering in the Scene Graph Details could cause Houdini to hang/crash in certain circumstances.

Fri. March 27, 2026
20.5.916

Added a Render Gallery setting to control whether the LOP Network is captured when taking a snapshot. The default remains true, keeping the pre-control behaviour.

Fri. March 27, 2026
21.0.668

Fixed issue where filtering in the Scene Graph Details could cause Houdini to hang/crash in certain circumstances.

Fri. March 27, 2026
21.0.667

Fixed OpenPBR Surface loading in Edit Material Network LOP.

Thu. March 26, 2026
21.0.667

Fixed an issue where ramp paramters could crash inside PCG nodes.

Thu. March 26, 2026