Now that Forge has Shadows, and objects in Forge can cast shadows. Is it now a reality to block out the maps natural lighting…AKA the Sun?
Sounds Plausible.
Depends on how severe the dynamic lighting system is. We haven’t seen much of it.
I am pretty sure you can.
If you build a square building with no way of the sunlight coming in it’s going to be dark in there unless you place lights. 
looks like zombies just got even better.