Fluid

Choose a fluid preset to start. Controls appear according to render mode and the active Water or Lava setup; Pixel fire mode bypasses the fluid solver and shows the Fire controls.

Fluid examples in motion

Blood splatter: control the emitter shape, color, timing, and forces.

Water crown: dedicated water shading adds tint, highlights, and distortion.

Pixel Fire: procedural flames with editable palette bands and pixel scale.

Simulation

Control	Inspector hint
Grid size	Simulation resolution. Higher is more detailed but much slower, and reallocates GPU textures.
Timestep	Seconds of simulated time per frame. Larger moves fluid faster but is less stable.
Jacobi iterations	Pressure solver passes per frame. Higher holds the fluid together better; lower is faster.
Velocity dissipation	How much motion survives each frame. Below 1 the fluid gradually slows to a stop.
Dye dissipation	How much colour survives each frame. Lower makes the trail fade away sooner.
Vorticity	Re-injects the swirl a grid solver loses, adding curls and wisps. 0 is smooth, high is churning.

Forces

Control	Inspector hint
Gravity X	Constant sideways force on the whole fluid, in cells per second squared.
Gravity Y	Constant vertical force. Positive pulls downward, since image +y is down.
Buoyancy	How strongly hot fluid rises. This is what drives fire and smoke upward.
Ambient temperature	The temperature buoyancy is measured against. Raise it and the same emitter rises less.

Liquid

Liquid controls shape the blood splatter’s flow and edges.

Control	Inspector hint
Viscosity	Smooths velocity into thicker, slower-moving flows. Raise it for syrup, slime, or honey.
Pigment diffusion	Spreads colour into neighbouring cells, softening narrow streaks and mixing the body of the liquid.
Edge sharpness	Restores contrast after pigment diffusion so the liquid keeps a readable silhouette.
Surface tension	Pulls curved density edges inward, encouraging rounded beads and cohesive blobs.
Heat retention	How much emitter heat survives each frame. It only changes motion when Temperature and Buoyancy are nonzero.
Turbulence strength	Adds deterministic curl-like motion to break up an overly smooth flow.
Turbulence scale	Controls the size of turbulent features. Low values make broad bends; high values make finer eddies.
Turbulence speed	Controls how quickly the seeded turbulence pattern evolves over simulation steps.
Turbulence seed	Selects a repeatable turbulence pattern without sacrificing deterministic exports.

Water

Water shading adds tint and highlights to the crown splash.

Control	Inspector hint
Water shading	Apply deterministic animated water tint, distortion, and highlights to this fluid.
Color correction	Blend from emitter or material colour toward the global water tint.
Distortion force	Warp the highlight noise coordinates without changing the transparent silhouette.
Highlight brightness	Add white light to the brightest wave-noise regions.
Highlight threshold	Set how bright the procedural wave noise must be before it becomes a highlight.
Highlight softness	Control the transition width between the water body and bright wave highlights.
Wave scale	Set the spatial frequency of the procedural water pattern.
Wave speed	Advance the water pattern using fixed simulation time; zero freezes it.
Flow X	Move the highlight pattern horizontally in UV units.
Flow Y	Move the highlight pattern vertically in UV units.
Water seed	Select a repeatable procedural water pattern.

Lava

Control	Inspector hint
Seamless flow	Loop lava from source A to destination B. Drag the handles in the preview. Disable for a simulated pour.
River width	Width of the flowing river as a fraction of the canvas.
Flow direction	Rotate the A-to-B channel around its midpoint. 0 moves right and 90 moves down. Shortens near canvas edges to keep both handles visible.
Edge curvature	0 makes straight banks; 1 restores the curved river edges. Intermediate values soften the curves without changing the seamless loop.
Flow speed	Surface motion multiplier: 0 freezes crust and molten cells, 0.1 gives slow motion, 1 is normal. Fractional speeds smoothly blend the pattern to keep the loop seamless.
Lava shading	Enable the dedicated animated Voronoi renderer for the Lava preset.
Cell morph speed	Amount of cell-shape animation relative to surface travel. 0 keeps cell shapes fixed. Flow speed scales both travel and morphing; 0 freezes the whole surface.
Cell scale	Control the number and size of molten cells across the lava surface.
Cell sharpness	Tighten the transition between dark crust and hot molten cells.
Emission	Brighten hot cells to emulate emission in exported RGBA sprites.

Render

Control	Inspector hint
Frame size	Square size of every preview and exported animation frame.
Pixel fire mode	Replace the fluid solver with the procedural pixel-fire generator.
Exposure	Multiplies output brightness before it is clamped.
Alpha gain	Multiplies opacity, so thin dye still reads. Raise it when the effect looks too faint.
Alpha threshold	Pixels fainter than this become fully transparent, cleaning up soft or noisy edges.

Filters

Control	Inspector hint
Pixelate	Output block size in pixels. 1 is off; higher gives chunkier pixel art.

Emitters

This tab contains an editable list. See below.

Fire

Pixel fire mode shows its procedural flame controls and colour bands.

Control	Inspector hint
Flow speed	How far the flame pattern travels per loop, as a fraction of height. Lower is a slower flame.
Noise scale	Flame detail. Low gives broad tongues, high gives fine flickering.
Turbulence	Blends in a finer second layer of noise to break up the flow.
Base height	Where the flame’s base sits, 0 at the top and 1 at the bottom edge.
Flame height	How far up the flame reaches before it fades out.
Flame width	Half-width of the flame at its base, as a fraction of the canvas.
Wind X	Bends the flame sideways, with the lean growing toward the tip.
Wind Y	Stretches the flame upward (negative) or presses it down (positive).
Debug heat map	Show the raw heat map instead of the palette. Useful for tuning the shape.

Export

Control	Inspector hint
Frame count	Number of frames in the exported animation.
Frameskip	Simulation steps run per exported frame. Higher advances the sim further between frames.
FPS	Playback rate recorded in the exported sidecar JSON.
Columns	Columns in the exported sheet. 0 picks a near-square grid.

Fluid emitters

Add a source in Emitters, select it, and set its colour and injection controls. Drag its cross in the preview to move it. A shaped kernel can replace the default soft round source.

Control	Editor hint
Position X	Where the emitter sits across the canvas, 0-1. Drag its cross in the preview to move it.
Position Y	Where the emitter sits down the canvas, 0-1. Drag its cross in the preview to move it.
Radius	Size of the blob injected each frame, as a fraction of the canvas.
Temperature	How hot the injected fluid is. Buoyancy makes hotter fluid rise faster.
Density	How much fluid is injected each frame. This is what drives the opacity of the effect.
Scale X	Stretches or compresses the injected shape horizontally before rotation.
Scale Y	Stretches or compresses the injected shape vertically before rotation.
Rotation	Rotates the Gaussian or selected shape kernel in degrees.
Falloff	Profile exponent. Below 1 spreads soft edges; above 1 tightens them.
Impulse X	A sideways push given to the fluid as it is injected, for angling the jet.
Impulse Y	A vertical push given to the fluid as it is injected. Negative aims upward.
Radial impulse	Pushes outward from the emitter; negative values pull inward for implosions.
Start frame	First frame this emitter injects on.
End frame	-1 means the emitter never stops
Pulse period	Frames per emission cycle. 0 keeps the source continuously active.
Pulse duty	Fraction of each pulse cycle that injects fluid.
Pulse phase	Offsets this emitter within its pulse cycle, useful for alternating sources.

The Water controls shade a fluid with animated tint, distortion and highlights. Lava controls a flowing river between draggable A/B endpoints or a simulated pour. Fire controls the procedural pixel-fire generator; its palette editor provides the colour bands and thresholds.