# Custom1

> The first stream of custom data, supplied from script.

## Definition

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

> **Warning:**
>
> **Deprecated.** ParticleSystemVertexStreams is deprecated. Please use ParticleSystemVertexStream instead.

```csharp
Custom1 = 2048
```

### Remarks

Additional Resources: [ParticleSystem.SetCustomParticleData](/engine/6000.0/script-reference/unityengine/particlesystem/setcustomparticledata.md), [ParticleSystem.GetCustomParticleData](/engine/6000.0/script-reference/unityengine/particlesystem/getcustomparticledata.md).