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# particleDiesOnCollision

A Boolean value that determines whether particles are removed from the scene upon colliding with another object.

```
var particleDiesOnCollision: Bool { get set }
```

## Discussion

This property has no effect if the [`colliderNodes`](/documentation/SceneKit/SCNParticleSystem/colliderNodes) array is empty or contains no nodes with attached geometry.

The default value is <doc://com.apple.documentation/documentation/Swift/false>, specifying that particles remain in the scene after a collision. The [`particleBounce`](/documentation/SceneKit/SCNParticleSystem/particleBounce) and [`particleFriction`](/documentation/SceneKit/SCNParticleSystem/particleFriction) properties determine whether and how particles bounce or slide after colliding with a geometry.

---

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