# maxRecursionDepth

> The maximum number of ray bounces this shader can trace (Read Only).

## Definition

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

```csharp
public float maxRecursionDepth { get; }
```

### Remarks

This value can be set in a .raytrace file using `#pragma max_recursion_depth` followed by a positive number.

If you set `max_recursion_depth` value too low, your graphics device may go into removed state, and crash Unity. To generate rays, your `max_recursion_depth` value must be at least 0. However, if you invoke the `TraceRay` HLSL function inside a closest hit shader (for example) your `max_recursion_depth` value must be at least 1.