Hollow cores in round rooms.

A really great option for the room generation, particularly for towers and other circular structures would be to give the option to put holes into the room.

An example would be if you have a 30 ft diameter tower, you could build the floor, then once done, you could make a 10 ft diameter section in the middle that does not generate anything, so you can split towers into rooms around the edges, whilst dedicating the center to the staircase. Currently, the system only allows for half moons, quarter moons and circles.