# customSimulationSpace

> Simulate particles relative to a custom transform component.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.7/script-reference/unityengine.md)
* **Assembly:** UnityEngine.ParticleSystemModule

```csharp
public Transform customSimulationSpace { get; set; }
```

### Remarks

Additional Resources: [ParticleSystemSimulationSpace.Custom](/engine/6000.7/script-reference/unityengine/particlesystemsimulationspace/custom.md)

### Examples

```csharp
using System.Collections;
using UnityEngine;

[RequireComponent(typeof(ParticleSystem))]
public class ExampleClass : MonoBehaviour
{
    private ParticleSystem ps;
    public Transform relativeTo;

    void Start()
    {
        ps = GetComponent<ParticleSystem>();

        var main = ps.main;
        main.simulationSpace = ParticleSystemSimulationSpace.Custom;
        main.customSimulationSpace = relativeTo;
    }
}
```