Fx Domain 2D

Overview

Defines the time and spatial domain that forms the foundation of particle FX such as flames, smoke, and splashes. Always place it first in an FX lane and use it to set the size, frame count, FPS, and seed. Add content downstream with fx_emitter_2d and fx_force.

Usage tips

• The standard FX lane is fx_domain_2d → fx_emitter_2d → fx_force → fx_rasterize → (finishing) → fx_bake_spritesheet. Build the complete lane first, then tune each stage.
• Start with a small total_frames, around 6–10. Pixel-art FX often look best with crisp movement across only a few frames.
• Treat seed as the reroll for the entire FX. If you do not like the shape, changing the seed is the quickest fix.

Related nodes

• fx_emitter_2d / fx_force — add content to the state
• fx_rasterize — converts the state to an image
• fx_bake_spritesheet — performs the final bake

Read this first

• Fx Domain 2D does not output an image by itself.
• It creates the base FX state.
• Add content with Fx Emitter 2D and Fx Force, then convert it to an image with Fx Rasterize.

When to use it

• When starting a short-frame FX such as a flame, smoke plume, or splash
• When you plan to bake the result later with Fx Bake SpriteSheet
• When creating the base state before Palette Quantize or Pixel Cleanup

The most basic setup

1. Add Fx Domain 2D.
2. Set width / height / total_frames / fps.
3. Connect fx to Fx Emitter 2D.

The minimal lane is:

FxDomain2D -> FxEmitter2D -> FxRasterize -> Preview

Example

• width = 32
• height = 32
• total_frames = 8
• fps = 12
• loop_enabled = true
• seed = 1

At this point, the contents of fx have approximately this meaning:

{
  "version": 1,
  "domain": {
    "width": 32,
    "height": 32,
    "total_frames": 8,
    "fps": 12,
    "loop_enabled": true,
    "seed": 1
  },
  "emitters": [],
  "forces": []
}

Notes

• Changing seed changes the result even with the same emitter and force settings.
• total_frames and fps become the source of truth for Fx Bake SpriteSheet downstream.
• P11 FX is a lightweight, bake-first FX lane, not a full fluid simulation.