# thickness

> The thickness of the terrain used for collision detection.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.7/script-reference/unityengine.md)
* **Assembly:** UnityEngine.TerrainModule

> **Warning:**
>
> **Deprecated.** Terrain thickness is no longer required by the physics engine. Set appropriate continuous collision detection modes to fast moving bodies.

```csharp
public float thickness { get; set; }
```

### Remarks

This lets the physics engine know how thick the Terrain is when used with a TerrainCollider. Any other colliders which are no less then thickness units underneath the Terrain will be considered to collide with the terrain, and will be moved above the terrain.