# Difference

> Indicates a composite operation that composes geometry using a Boolean NOT operation.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine](/engine/6000.7/script-reference/unityengine.md)
* **Assembly:** UnityEngine.Physics2DModule

```csharp
Difference = 3
```

### Remarks

This composite operation will result in a region where this operation geometry region which overlaps is not included.

Additional Resources: \_compositeOperation, [\_compositeOrder](/engine/6000.7/script-reference/unityengine/collider2d/compositeorder.md)