Now we would need to be able to lit the surface base buildings based on surface illumination beneath them.
It is doable without too much difficulty on small surfaces without that. It would still be interesting to find solutions that can be applied to large areas at once - can be all the map - while maintaining a good appearance of realism. Maybe not at Orbiter's level 19 but 15 or 16. While restoring night lights seen from far as they existed ( Jim Williams addon for example) in the 2005 version .