# Sandbox.Model.ModelMeshInfo.MeshData.MeshGroupMask

```csharp
ulong MeshGroupMask { get; set; }
```

Which body groups draw this mesh. A renderer draws it when this shares a bit with
its [Sandbox.ModelRenderer.BodyGroups](/api/Sandbox.ModelRenderer/BodyGroups).

Declared in [Sandbox.Model.ModelMeshInfo.MeshData](/api/Sandbox.Model.ModelMeshInfo.MeshData).
Assembly: `Sandbox.Engine`.