I have a suggestion on the texturing…
When you’re weathering your textures, think hard about where dirt and grim is, and why it’s there. If there is to be a water drain, then there would be water stains and rust marks around that area. (Remember, rust can happen on just about anything. It’s not exclusive to a solid metal object.)
Remember, even though it’s abandoned now, somewhere along the line, maybe 10 years ago, someone was still taking care of it as well as they could. If you go to the internal sections of any seedy downtown, like Chicago, New York, L.A., Detroit, you’ll see that with weathering also comes a lot of stories. For example: A lot of your graffiti looks excellent, but it appears as if it’s just been tagged on there, without resistance. Put some areas where graffiti was in the past, but sometime they painted over it to try to get rid of it. There are a lot of jealous kids in the graffiti world who don’t respect the work of others, so they put a quick tag on top of it. Don’t be afraid to ‘mess up’ the graffiti.
I like the overall feel of the scene, even if it is a little overexposed. Your texture style reminds me of some things we’ve seen in Resident Evil 4. There is a sharpness to all things, and ‘ugly’ colors like blood red, and green seem very vibrant.
Oh yeah, board up one of those windows! You know you want to!
Good job so far.