# None

> No vertex attributes

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine.XR](/engine/6000.7/script-reference/unityengine/xr.md)
* **Assembly:** UnityEngine.XRModule

```csharp
None = 0
```

### Remarks

Used by [XRMeshSubsystem.GenerateMeshAsync](/engine/6000.7/script-reference/unityengine/xr/xrmeshsubsystem/generatemeshasync.md) to indicate that no additional attributes be generated, or by [MeshGenerationResult](/engine/6000.7/script-reference/unityengine/xr/meshgenerationresult.md) to indicate that no attributes (other than positions) were written to the [Mesh](/engine/6000.7/script-reference/unityengine/mesh.md).

Additional Resources: [XRMeshSubsystem.GenerateMeshAsync](/engine/6000.7/script-reference/unityengine/xr/xrmeshsubsystem/generatemeshasync.md), [MeshGenerationResult](/engine/6000.7/script-reference/unityengine/xr/meshgenerationresult.md)