Force fields
Invisible fields that push, pull, swirl, or roughen nearby particles — with per-emitter routing so each field affects only what you want.
Open in the interactive manual →The interactive version has full-text search, a table of contents, and light/dark themes.
A force field influences particles within its radius — to swirl a cloud, suck it inward, blow it sideways, or rough it up. Add one with Create ▸ Force Field, then tune it in the Force Field section of Properties.
Field types
| Type | Effect |
|---|---|
| Vortex | Particles swirl around the field's axis. |
| Gravity well | Pulls particles inward toward the center. |
| Wind | Pushes particles in one direction. |
| Turbulence | Adds chaotic curl-noise jitter. |
Aim a Wind or Vortex field by rotating the node — both use its local +Y axis. In the editor a field draws as a translucent sphere of influence (with an arrow for Wind/Vortex) so you can see its reach.
Field controls
- Radius — the sphere of influence.
- Strength — how hard it pushes. Negative strength inverts the field — gravity repels, wind reverses.
- Falloff — Constant, Linear, or Inverse-square across the radius.
- Frequency — turbulence only; the scale of the noise.
Affinity routing
By default a field affects every emitter in the scene. But each emitter has a Force-field affinity control (it appears once a field exists): uncheck "Affected by all fields" and tick only the fields you want this emitter to feel. So one vortex can spin your sparks while leaving the smoke alone.