# maskInteraction

> Specifies how the TrailRenderer interacts with SpriteMask.

## Definition

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

```csharp
public SpriteMaskInteraction maskInteraction { get; set; }
```

### Remarks

By default, trails do not interact with SpriteMasks and are visible regardless of whether you assign a SpriteMask or not. You can make the TrailRenderer visible either inside or outside a SpriteMask. To do the former, set this to [SpriteMaskInteraction.VisibleInsideMask](/engine/6000.6/script-reference/unityengine/spritemaskinteraction/visibleinsidemask.md). To do the latter, set this to [SpriteMaskInteraction.VisibleOutsideMask](/engine/6000.6/script-reference/unityengine/spritemaskinteraction/visibleoutsidemask.md). Additional Resources: [SpriteMaskInteraction](/engine/6000.6/script-reference/unityengine/spritemaskinteraction.md).

### Examples

```csharp
using UnityEngine;
using System.Collections;

[RequireComponent(typeof(TrailRenderer))]
public class ExampleClass : MonoBehaviour
{
    private TrailRenderer r;
    public SpriteMaskInteraction maskInteraction;

    void Start()
    {
        r = GetComponent<TrailRenderer>();
    }

    void Update()
    {
        r.maskInteraction = maskInteraction;
    }

    void OnGUI()
    {
        maskInteraction = (SpriteMaskInteraction)GUI.SelectionGrid(new Rect(25, 25, 900, 30), (int)maskInteraction, new GUIContent[] { new GUIContent("No Masking"), new GUIContent("Visible Inside Mask"), new GUIContent("Visible Outside Mask") }, 3);
    }
}
```