# walkableMask

> Specifies which NavMesh layers are passable (bitfield). Changing walkableMask will make the path stale (see _isPathStale ).

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine.AI](/engine/6000.6/script-reference/unityengine/ai.md)
* **Assembly:** UnityEngine.AIModule

> **Warning:**
>
> **Deprecated.** Use areaMask instead.

```csharp
public int walkableMask { get; set; }
```