# Off

> Use this mode to ensure the ray tracing instances are not added to a RayTracingAccelerationStructure, and that they cannot be ray traced.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine.Experimental.Rendering](/engine/6000.5/script-reference/unityengine/experimental/rendering.md)
* **Assembly:** UnityEngine.CoreModule

```csharp
Off = 0
```