Just a simple mirrored arena and some bridges and catwalks. Mostly so I can get a feel for the scale of the place.
The width of the corridors is important as you can see because as a player I do a lot of 180 strafe turnings when fighting things that are near me.
Having enough space to do that makes a big difference.
The Lighting seems to have generated a bit weirdly.
developer.valvesoftware.com/wiki/Dimensions
It covers Covers Dod, TF2, CS:Go, Alien Swarm and of course HL2, so you get stuck just visit the wiki.
#leveldesign