Solvers overview

BLUX has four GPU solvers. Pick by the effect you want:

I want to make…	Use	Notes
a campfire, fireball, smoke plume or thruster	Blaze	Grid-based gas. Output is an OpenVDB volume sequence.
water, oil, honey, a splash, a wave tank	Hydro	Particle liquids with a surface mesher and whitewater.
sand, snow, mud, jelly, slime, lava, bending metal	Atom	Material Point Method with eight material models.
a collapsing wall, shattering glass, a wrecking ball	Impact	Rigid bodies with Voronoi fracture and breakable bonds.

Choosing a solver comes first. With no graph in the file, no solver is pre-selected, and the Templates menu lists every solver alike. Picking one builds a graph with that solver’s own nodes only. A graph that already exists keeps its nodes when you switch solver.

Combining solvers

A Blaze solver can run beside any particle solver (Atom, Hydro or Impact). Wire the particle solver to the Simulation Output’s Simulation State input and the Blaze solver to its Blaze Simulation input. Each gets its own domain, and both are simulated, cached and baked together. A Blaze Coupling node turns particles into gas sources, so lava can smoke or debris can raise dust. See Particles and gas together.

Time

All solvers run on one real-time clock. A Blender frame advances 1/fps seconds of simulated time, multiplied by the solver node’s Time Scale (1.0 is real time, 0.15 is bullet time). The solver chooses how many substeps that needs.

Which nodes each solver reads

A solver reads only some node types. A node it does not read does nothing, and shows a warning on the node.

	Atom	Blaze	Hydro	Impact
Emitters	Particle, Mesh	Blaze Emitter, Blaze Coupling	Particle, Mesh	Particle, Mesh, Impact Source
Materials	the eight Atom materials	none	Hydro Liquid	none
Gravity, Wind, Drag	yes	yes	yes	yes
Vortex, Turbulence, Attractor, Curve	yes	yes	yes	yes
Explosion	yes	yes	yes	yes
Buoyancy	yes	yes	no	no
Object Collider, Ground Plane	yes	yes	yes	yes
Kill Volume	yes	yes	yes	no
Blaze Outflow	no	yes	no	no
Particle Wrangle	yes	no	yes	yes
Field Wrangle	no	yes	no	no
Solver-specific details	Atom Multiphase	Combustion, Blaze Dissipation, Blaze Turbulence	Liquid Two-Phase, Whitewater	Constraint, Rebar, Debris, Joint, Group, Group Combine, Activation, Trigger
Meshers	Surface, Instance	none	Surface	none
Output modes	Points, Instances, Surface	Volume	Points, Surface	Points

Buoyancy is left out of Impact because a rigid body needs a fluid surface to float on, which no node defines.

Every node, with its sockets and settings, is in the Node Reference.