# ParticleSystemSimulationSpace

> The space to simulate particles in.

## Definition

* **Type:** Enum
* **Namespace:** [UnityEngine](/engine/6000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.ParticleSystemModule

```csharp
public enum ParticleSystemSimulationSpace
```

## Fields

| Value                                                                                         | Description                                                                                                                                                                                                                |
| --------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [Custom](/engine/6000.0/script-reference/unityengine/particlesystemsimulationspace/custom.md) | Simulate particles relative to a custom transform component, defined by [ParticleSystem.MainModule.customSimulationSpace](/engine/6000.0/script-reference/unityengine/particlesystem/mainmodule/customsimulationspace.md). |
| [Local](/engine/6000.0/script-reference/unityengine/particlesystemsimulationspace/local.md)   | Simulate particles in local space.                                                                                                                                                                                         |
| [World](/engine/6000.0/script-reference/unityengine/particlesystemsimulationspace/world.md)   | Simulate particles in world space.                                                                                                                                                                                         |