---
title: SCNParticleModifierStage.postDynamics
framework: scenekit
role: symbol
role_heading: Case
path: scenekit/scnparticlemodifierstage/postdynamics
---

# SCNParticleModifierStage.postDynamics

The stage after SceneKit simulates the motion of particles.

## Declaration

```swift
case postDynamics
```

## Discussion

Discussion Insert a modifier block at this stage to alter the output of the dynamics simulation. For example, if you modify the positions of particles during this stage, the modified positions override those determined by SceneKit’s simulation.

## See Also

### Constants

- [SCNParticleModifierStage.preDynamics](scenekit/scnparticlemodifierstage/predynamics.md)
- [SCNParticleModifierStage.preCollision](scenekit/scnparticlemodifierstage/precollision.md)
- [SCNParticleModifierStage.postCollision](scenekit/scnparticlemodifierstage/postcollision.md)