World Collision Affector
Updated: 30 Sep 2025
Allows particle collisions with all 3D object in the scene.
World Collision Affector
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.
Parameters
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.
The properties control the time at which the node is active. See Timeline for editing time segments.
Parameter Details Duration
Control the duration of the node’s time segment.
- Composition Duration : Use the length of the composition for the node’s time segment duration.
- Custom : Set a custom duration for the node’s time segment.
Node Time
The custom start and end time for the node.
Duration (Timecode)
The length of the node’s time segment (in time).
Duration (Frames)
The length of the node’s time segment (in frames).
Time Segment Enabled
Set whether the node’s time segment is enabled or not in the Timeline.
Inputs
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. |
The properties control the time at which the node is active. See Timeline for editing time segments.
| Parameter | Details |
|---|---|
| Duration |
Control the duration of the node’s time segment.
|
| Node Time | The custom start and end time for the node. |
| Duration (Timecode) | The length of the node’s time segment (in time). |
| Duration (Frames) | The length of the node’s time segment (in frames). |
| Time Segment Enabled | Set whether the node’s time segment is enabled or not in the Timeline. |
| 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 |