Defines the way Unity chooses a probe to light a Renderer that is lit by Light Probes but positioned outside the bounds of the Light Probe tetrahedral hull.
When a Renderer that is lit by Light Probes is positioned outside the bounds of a Light Probe tetrahedral hull, there are two different approaches Unity can use to light that Renderer. Unity can either search for the probe closest to that Renderer (which is a resource-intensive process) or use the Ambient Probe. Configure this enum to determine which approach Unity uses in this situation.