World Collision Affector

Updated: 30 Sep 2025

Allows particle collisions with all 3D object in the scene.

Method #

Allows particles to collide with the scene’s visible geometry.

By default, adding this node will cause all particles attached to the same root to collide with all 3d objects in your scene.

This behaviour can be altered by using the input pins to include/exclude 3d objects or particle emitters from the affector.

Attributes

These properties control the core behaviours of the node.

Parameter	Details
Collision Velocity Scale	Scales the velocity of the particle after a collision so they can be made to slow down.
Point Collision Radius	Radius around a particle in which it will calculate colliding.

Name	Description	Typical Input
Included Nodes	Connecting 3D nodes to this input pin will ensure collisions only occur with those objects.	3D Primitive
Excluded Nodes	Connecting 3D nodes to this input pin will ensure collisions do not occur with those objects.	3D Primitive
Collision Event Nodes	Particle events to be triggered when collisions occur.	Particle Event
Affected Emitters	Choose which particle emitters can be affected by the affector.	Primitive Emitter
Procedural Falloff	Use the distance field from a procedural system to vary how strong the affector is.	Procedural Root
Weights	Add a particle weight node to vary the node’s effect on the particle system.	Noise Weight
Transform Modifiers	Apply the transforms of another node to this node.	Null
Target Node	Modifiy the rotations of the node to always direct the z axis towards the input.	Null
Local Transform Override	Apply the transforms of another node to this node, relative to its parent.	Null