# Sandbox.PhysicsBodyBuilder.SetSurface

```csharp
PhysicsBodyBuilder SetSurface(Surface surface)
```

### Parameters

- `surface` (`Surface`): The surface properties applied to the body.

### Returns

`PhysicsBodyBuilder`

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