As you move an object around relative to a point light, the number of shadow casters in the stats window goes up and down. Sometimes 1, sometimes 2, sometimes 3 shadow casters as the object is moved around within the range of the light. I read here in the documentation for Unity 5.6 that point lights use a cube map for shadows. I'm guessing it has something to do with that. But I don't understand how that works, and can't find any info on how the cubemap is used in the shadow rendering. So if anyone could explain why the number of shadow casters changes, and if related, how the cubemaps are used for rendering shadows for point lights, that would be appreciated. Note that I'm assuming this has nothing to do with shadow cascades as their are no directional lights in the scene, and setting shadow cascades to No Cascades in Quality settings has no affect on the number of shadow casters in my scene.