# Custom1XYZW

> Four custom values for each particle, defined by the Custom Data Module, or ParticleSystem.SetCustomParticleData.

## Definition

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

```csharp
Custom1XYZW = 34
```