Lens Flares not appearing

For some reason, the only flares that work are the single flare attached to my directional light, used as sunlight. All other flares seem to just have disappeared, though, including the one I am using in my lighthouse. Deleting the component and adding it as separate components does not work. I have checked my camera, the flare layer is in place and enabled. Any ideas?

Are they inside or behind colliders? (even trigger colliders)

Unity flares have a nasty and long standing limitation in that they’re occluded by any and all colliders.

No they…wait…yes… The glass of the lighthouse. It had a shell modifier applied in 3Ds Max. If I take that off, then the light would end up being inside a collider rather than being surrounded by one. What effect will that have? And does the Character Controller act as a collider? It has a green mesh, but…