First city/bus views going to disco

It takes a long time to render these. Almost 2 hours. Maybe if I would use only ghost lights, it would be better but I am not sure yet how to do this well for large outdoor environments. I also need a sky dome (although I could have skipped the dome here because the bus obstructs view of the sky), which only functions with environment lighting and I only get the advantage from ghost light render time if I don't use environment lighting.

Anyway, while waiting for renders to complete I can catch up with other stuff in life.