Sidefx Houdini 20.5.278 Jun 2026

The you are focusing on (e.g., Pyro FX, rigging, Copernicus texturing)

Fixed memory leaks and viewport refreshing issues when scrubbing dense USD timelines.

You work in different "rooms" depending on the task :

This build marked the debut of several high-profile features now standard in the 20.5 series: Copernicus: SideFX Houdini 20.5.278

This article provides an exhaustive overview of what Houdini 20.5.278 brings to the table, including core improvements, Karma rendering upgrades, SOP (Surface Operator) changes, Solaris enhancements, and why this specific build number matters for your pipeline.

A complete reimagining of the 2D compositing and texturing context, driven by modern GPU acceleration.

: A redesigned Sculpt SOP provides a more interactive brush-based workflow for static meshes, complete with mask capabilities and improved stroke types. Version Stability and Performance Notes The you are focusing on (e

Build 278 showcases the continued integration of APEX, SideFX’s new motion design and character animation framework. Unlike traditional keyframe editors, APEX uses a layered, node-based system that mirrors Houdini’s procedural logic. In version 20.5.278, the APEX graph editor experiences improved undo handling and faster evaluation for complex character rigs, finally making it a viable alternative to native DCC tools for walk cycles and crowd variations.

Here's a breakdown of your workflow:

In Houdini, you start by creating a new project and setting up your scene. You begin by adding a simple sphere object, which will serve as the base for your effect. : A redesigned Sculpt SOP provides a more

While a major milestone, this specific build had notable early-release feedback: Startup Times:

While build includes specialized patches, it provides full access to the core innovations of the 20.5 lifecycle: Sneak peek: Houdini 20.5 - CG Channel