# Sandbox.PhysicsGroup.SetSurface

```csharp
void SetSurface(string name)
```

Sets the physical properties of each [PhysicsShape](/api/Sandbox.PhysicsShape) of this group.

### Parameters

- `name` (`string`)

Declared in [Sandbox.PhysicsGroup](/api/Sandbox.PhysicsGroup).
Assembly: `Sandbox.Engine`.