Version: Unity 6.1 Alpha (6000.1)
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RayTracingInstanceCullingConfig.minSolidAngle

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public float minSolidAngle;

Description

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

If the projected solid angle of a Renderer relative to cameraPosition value from RayTracingInstanceCullingConfig.lodParameters is smaller than minSolidAngle then the Renderer is not added to the acceleration structure.

To enable solid angle culling, use the RayTracingInstanceCullingFlags.EnableSolidAngleCulling flag in RayTracingInstanceCullingConfig.flags.

Additional resources: RayTracingAccelerationStructure.CullInstances.