# extraVertexChannels

> Optional per-vertex channels that custom ShaderGraph shaders attached to this panel can read.

## Definition

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

```csharp
public ExtraVertexChannels extraVertexChannels { get; set; }
```

### Remarks

Adds GPU memory per vertex for the enabled channels. Leave at [ExtraVertexChannels.None](/engine/6000.7/script-reference/unityengine/uielements/extravertexchannels/none.md) unless a shader requires the extra data. Changing this setting after initialization rebuilds the panel's render chain.

Additional Resources: [UIMesh](/engine/6000.7/script-reference/unityengine/uielements/uimesh.md)