# Sandbox.PhysicsGroupDescription.BodyPart.MeshPart.GetTriangleSurfaces

```csharp
Surface[] GetTriangleSurfaces()
```

The surface of every triangle, in the same order as [Sandbox.PhysicsGroupDescription.BodyPart.MeshPart.GetIndices](/api/Sandbox.PhysicsGroupDescription.BodyPart.MeshPart/GetIndices). Null
when the whole mesh shares [Sandbox.PhysicsGroupDescription.BodyPart.Part.Surface](/api/Sandbox.PhysicsGroupDescription.BodyPart.Part/Surface).

### Returns

`Surface[]`

Declared in [Sandbox.PhysicsGroupDescription.BodyPart.MeshPart](/api/Sandbox.PhysicsGroupDescription.BodyPart.MeshPart).
Assembly: `Sandbox.Engine`.