# DefaultRaycastLayers

> Layer mask constant to select default raycast layers.

## Definition

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

```csharp
public const int DefaultRaycastLayers = -5
```

### Remarks

This can be used in the layermask field of [Physics.Raycast](/engine/6000.7/script-reference/unityengine/physics/raycast.md) and other methods to select the default raycast layers. The default layers are all layers except for the ignore raycast layer.

Additional Resources: [Physics.AllLayers](/engine/6000.7/script-reference/unityengine/physics/alllayers.md), [Physics.IgnoreRaycastLayer](/engine/6000.7/script-reference/unityengine/physics/ignoreraycastlayer.md)