Look around the tubes in center when the group gunfights of multiple teams happen. Just one example, on the first demo.
yeah looking at that again, i'd have to say yes on walls. after a good night's sleep i'm seeing it better. and thanks to cyber for pointing out tick 11k in the 2nd demo, i'd say walls for sure. not meaning to be a flip-flopper, just getting a better look at it.
Through the darkness of futures past,
The magician longs to see
One chants out between two worlds:
Fire, walk with me.