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

4.0.135

• 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.
• Cuda Version 12.2, Linux Driver 525.60.13+, Windows Driver 525.41+
• Released 02 April 2026
• Download 4.0.135

4.0.133

• Updated for the Houdini 21.0.631 production build.
• Supports Houdini 20.0.896, 20.5.654, 20.5.684, 21.0.559, 21.0.594, & 21.0.631 on Windows, macOS, & Linux.
• Cuda Version 12.2, Linux Driver 525.60.13+, Windows Driver 525.41+
• Released 23 February 2026
• Download 4.0.133

4.0.131

• Updated for the Houdini 21.0.596 production build.
• Supports Houdini 20.0.896, 20.5.654, 20.5.684, 21.0.512, 21.0.559, & 21.0.594 on Windows, macOS, & Linux.
• Cuda Version 12.2, Linux Driver 525.60.13+, Windows Driver 525.41+
• Released 16 January 2026