# minSolidAngle

> The minimum solid angle in degrees that Unity uses for culling ray tracing instances associated with the Renderers in a Scene.

## Definition

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

```csharp
public float minSolidAngle
```

### Remarks

If the projected solid angle of a Renderer relative to cameraPosition value from [RayTracingInstanceCullingConfig.lodParameters](/engine/6000.7/script-reference/unityengine/rendering/raytracinginstancecullingconfig/lodparameters.md) is smaller than minSolidAngle then the Renderer is not added to the acceleration structure.

To enable solid angle culling, use the [RayTracingInstanceCullingFlags.EnableSolidAngleCulling](/engine/6000.7/script-reference/unityengine/rendering/raytracinginstancecullingflags/enablesolidangleculling.md) flag in [RayTracingInstanceCullingConfig.flags](/engine/6000.7/script-reference/unityengine/rendering/raytracinginstancecullingconfig/flags.md).

Additional Resources: [RayTracingAccelerationStructure.CullInstances](/engine/6000.7/script-reference/unityengine/rendering/raytracingaccelerationstructure/cullinstances.md).