# UInt32

> 32 bit mesh index buffer format.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine.Rendering](/engine/6000.7/script-reference/unityengine/rendering.md)
* **Assembly:** UnityEngine.CoreModule

```csharp
UInt32 = 1
```

### Remarks

This format supports meshes with up to 4 billion vertices.

Note that GPU support for 32 bit indices is not guaranteed on all platforms; for example Android devices with Mali-400 GPU do not support them. When using 32 bit indices on such a platform, a warning message will be logged and mesh will not render.

Additional Resources: [Mesh.indexFormat](/engine/6000.7/script-reference/unityengine/mesh/indexformat.md), [ModelImporter.indexFormat](/engine/6000.7/script-reference/unityeditor/modelimporter/indexformat.md), [SystemInfo.supports32bitsIndexBuffer](/engine/6000.7/script-reference/unityengine/systeminfo/supports32bitsindexbuffer.md).