The metal girder'd buildings look more like MOMA installations than buildings. Why would they be placed in that arrangement? on the exterior? Rest of map looks like it's coming along okay though. Maybe change that concrete surface to a blendmat disp w/ the reddish ground in the background, show accumulation of dust in cracks etc
Those grey ibeams look horrendous. Also why are some of them at weird angles? TF2 aesthetics never do that. Metal stuff is always neat and uniform, the wooden stuff is more mismatched and patchy.
The cliffs also look too uniform. There are so many steps to them... is this from a reference picture? Because it looks way off from something natural. I'll assume the tops are flat because you just havn't got around to that yet, but personally i'd have larger and fewer cliff segments.
The shadow grouping to smooth the shadow transition on the building in the middle-back actually looks more odd than nice, but i'm not sure whether it's because i'm not used to seeing that in Source or whether it's because it should actually have a hard transition. Shadows on structure edges like that really are hard and it probably should be left that way.
The use of the metal door texture for the fencing is also pretty repetitive, is that because it's a place holder? It would probably be OK just to have it used on the pieces around the CP, but you should mix it up in other areas of the map in future.
Final bit of criticism is that the spotlights during daytime look... not right.
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