# SetLayerMask(LayerMask)

> Sets the ContactFilter2D.layerMask filter property using the layerMask parameter provided and also enables layer mask filtering by setting ContactFilter2D.useLayerMask to true.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine](/engine/6000.5/script-reference/unityengine.md)
* **Assembly:** UnityEngine.Physics2DModule

```csharp
public void SetLayerMask(LayerMask layerMask)
```

### Parameters

**** (\[LayerMask]\(/engine/6000.5/script-reference/unityengine/layermask)): The value used to set the [ContactFilter2D.layerMask](/engine/6000.5/script-reference/unityengine/contactfilter2d/layermask.md).