# alphaCutoff

> The minimum alpha value used by the mask to select the area of influence defined over the mask's sprite.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.3/script-reference/unityengine.md)
* **Assembly:** UnityEngine.SpriteMaskModule

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