Introduction

BLUX Physics Suite adds GPU physics simulation to Blender. It covers granular materials, liquids, smoke and fire, and rigid-body fracture, and it caches and renders the results with Blender’s own tools.

The node graph is the source of truth

Every setting, force and collider lives in a node. The sidebar panels edit and display that graph, so you can work from either place and see the same values. A simulation is a graph: emitters, forces and colliders feed a solver node, and the solver feeds a Simulation Output node that decides how results are cached and displayed.

Screenshot placeholderNode editor showing a small Hydro graph: emitter, gravity, ground, solver, Simulation Output.intro-node-graph.png

A simple Hydro graph in the BLUX Physics Graph editor.

The four solvers

Solver	Method	Use it for
Atom	Moving Least Squares Material Point Method	sand, snow, jelly, slime, viscous fluid, lava
Hydro	Particle-based incompressible liquid	liquids, fountains, whirlpools, buoyancy
Blaze	Eulerian grid smoke and fire	campfires, fireballs, smoke plumes, thrusters
Impact	Rigid bodies on Extended Position Based Dynamics (XPBD)	Voronoi fracture, demolition, plastic crumple

All four are written in Taichi and run on your GPU.

Atom materials

Material	Model
Sand	Drucker-Prager frictional plasticity
Elastic	Neo-Hookean hyperelastic, with optional tearing
Snow	Elastoplastic with fracture
Fluid	Weakly-compressible viscous liquid
Lava	Thermo-viscous, temperature-driven solidification

What else is in the box

• Wrangles. Short pieces of code that run on the GPU for every particle or every gas voxel, written in a Python-like language with @ attributes. See Wrangles.
• Liquid surface meshing. Hydro and Atom liquids become production meshes, baked frame by frame and streamed back through Geometry Nodes.
• Whitewater. Spray, foam and bubbles generated on the GPU from the liquid.
• Blaze upres. Wavelet turbulence re-advects smoke and fire at 2x, 3x or 4x the simulation resolution in bakes.
• Particles and gas together. A Blaze solver can run beside any particle solver, and the two can drive each other.
• Lookdev presets. Turnkey materials for fire, smoke, water, honey, mud, lava, concrete, brick and glass.
• Templates. Ready-made scenes for every solver.

How it works behind the scenes

The solvers do not run inside Blender’s own Python. BLUX starts a separate worker process that has Taichi installed, and talks to it over a loopback connection on your own machine (127.0.0.1). Results come back to Blender through shared memory and the disk cache. This is why the installation has a second step: giving BLUX a Python that has the GPU runtime.

Next steps

1. Check the requirements.
2. Install the extension and the solver Python.
3. Open the preferences and run Check Solver Environment.