Sidefx Houdini 20.5.278 May 2026

In 20.5.278, Karma XPU (the GPU/CPU hybrid renderer) sees significant stability improvements.

See the official SideFX changelog and release pages for the full list of fixes and the Houdini installer for 20.5.278. SideFX Houdini 20.5.278

(If you want, I can turn this into a longer blog post with screenshots, a short changelog table, and upgrade checklist.) Vellum received a dedicated XPU solver in 20

This version is part of the 20.5 production series, focusing on stability, workflow refinement, and specific high-impact tools. While 20.5 introduced major overhauls (like Karma XPU and APEX), version 20.5.278 represents a mature, stable release with key bug fixes and performance tweaks. a short changelog table

Here are the most helpful features and improvements you will actually use in this build.

Vellum received a dedicated XPU solver in 20.5.