I raised the roof by 3m and put in supports. I tried using a simple texture to represent the supports but it just looked fake, so I added lots of cylinders as support pillars and added some chicken wire to keep the local flying wildlife out. In future parts of this will contain storage tanks and odd bits of machinery like aircon units.
I also rotated and changed the staff elevator so that it now reaches the roof, rotated the radar tower and added always to both. There's also a weatherproof "waiting room" at the top of the stair well (which now goes all the way from Level 1 to the Roof) on the roof next to the goods lift. It rains a lot in the void. With an "endless" ocean somewhere below, expect a bit of precipitation!
