# activeTrailVertexStreamsCount

> The number of currently active custom trail vertex streams.

## Definition

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

```csharp
public int activeTrailVertexStreamsCount { get; }
```

### Remarks

Additional Resources: [ParticleSystemRenderer.SetActiveTrailVertexStreams](/engine/6000.7/script-reference/unityengine/particlesystemrenderer/setactivetrailvertexstreams.md), [ParticleSystemRenderer.GetActiveTrailVertexStreams](/engine/6000.7/script-reference/unityengine/particlesystemrenderer/getactivetrailvertexstreams.md)