# flags

> The flags that control different options in RayTracingAccelerationStructure.CullInstances function.

## Definition

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

```csharp
public RayTracingInstanceCullingFlags flags
```

### Remarks

Note that the flags will impact the performance of this function.