Theory Accelerated has released a first look at Axiom 4.0, its GPU-accelerated sparse volumetric fluid solver for Houdini. The preview highlights more accurate collision handling, a rebuilt sourcing system, and 5–15% faster simulations.
Cleaner Collisions
Axiom 4.0 improves fluid–geometry interactions, particularly with animated colliders. Simulations show better volume retention and fewer artefacts in tight or complex spaces.
Sourcing Overhaul
The sourcing workflow has been restructured, paired with an updated Output tab for finer control. The new design aims to simplify parameter handling and make feedback loops clearer.
Performance Gains
On the performance side, Axiom 4.0 adopts Intel’s Threading Building Blocks for CPU multi-threading. This brings an overall 5–15% speed increase, especially when running outside GPU acceleration.
Release and Compatibility
Axiom 4.0 is in closed beta with no release date announced. It is previewed as compatible with “the latest Houdini builds” and the upcoming Houdini 21. The current stable release, Axiom 3.3, runs on Windows, Linux, and macOS. Pricing remains unchanged at $199 (commercial node-locked), $99 (Indie), and free for Apprentice users.
Industry Use
Axiom has been adopted as a faster alternative to Houdini’s native Sparse Pyro solver. It has already been used in production by Riot Games, Valve, and Muse VFX. The solver supports CUDA, OpenCL, and Metal, covering a wide range of GPU hardware.
