Here are all updates, patches, bug fixes, and build info.

4.0.137

• Fixing a sourcing bug that was introduced in the 4.0.135 build. The bug broke VDB collision sourcing. It could have ignore colliders or caused some field values such as collision temperature or collision velocity to be set incorrectly.
• Supports Houdini 20.0.896, 20.5.613, 20.5.654, 20.5.684, 21.0.440, 21.0.512, 21.0.594, 21.0.631, & 21.0.671 on Windows, macOS, & Linux.
• Cuda Version 12.2, Linux Driver 525.60.13+, Windows Driver 525.41+
• Released 10 April 2026
• Download 4.0.137

4.0.136

• This build has major bugs with collision sourcing.
• License update. More stable license server connections and better corrupted message handling. Added support for a new bundle license type.
• Supports Houdini 20.0.896, 20.5.613, 20.5.654, 20.5.684, 21.0.440, 21.0.512, 21.0.594, 21.0.631, & 21.0.671 on Windows, macOS, & Linux.
• Cuda Version 12.2, Linux Driver 525.60.13+, Windows Driver 525.41+
• Released 08 April 2026
• Download 4.0.136

4.0.135

• This build has major bugs with collision sourcing.
• Updated for the Houdini 21.0.671 production build.
• Fixed a bug with sourcing a mask volume that could have caused artifacts.
• Supports Houdini 20.0.896, 20.5.654, 20.5.684, 21.0.594, 21.0.631, & 21.0.671 on Windows, macOS, & Linux.