I've never been able to create a convincing night time shot of one of my models - I am experiementing at the moment when I've got some time spare -
In a test model I have created a a 2 storey building.
I have added 3 lights on the ground and first floors, and 3 outside along the front of the building.
The best "success" I get is with the Sky and Sun switched off.
If they (sky and sun) are on then they seem to completely nullify the effect of the point source lights I have placed. Even if I set the suntime to the middle of the night. The result here is complete blackness.
I have attached my best effort - please could someone take a look and see where I'm going wrong.