Looks more appropriate for zombies or TTT but still looks good. Also you like those curving arches on fronts of building don't you?
Yay displacements.
Nop. It's all brushwork.
Uhhh..Clipping tool? :3
Nope. Vertex manipulation and patience.
Expert Quality.
Not part of the map (spoiler alert) yet, but I spent the weaker part of today working on this elevator in a dev/practice type setting.-snip-
Looks like it should be the basic design of a skyscraper for the RP maybe?