I don't have much to say texture wise. . .I personally don't mind the boring grey maps. . .as long as they're lit well, of course. But I can't help but imagine it with a red brick texture in there. . .I think it could really work!
Um, with lighting. Like seed and uarchitect mentioned there isn't much contrast (from the screenshots you've shown) at all. And other then the stock standard (but still nice looking) orange and blue, you could always use orange and green, yellow and blue/white or go all noveux or brunel on us and use a whole host of gaudy, saturated colours just as long as everything is cohesive. Just try to make sure you have your main light colour (eg. yellow) a highlighting colour (eg icybluey sort of thing
) and your ambient light. And throw some gorgeous shadows in wherever you can, you can never have too many!! With the light textures, just have a different texture for each colour. . .just as long as they go together (so don't mix crypt with richrig
)
One last thing, try and avoid having your masked textures set to such a low scale (I mean you prolly don't have all of 'em set low. . .but two of your screenies do
) Having too many masked textures alone can cause your map too run slower than an atrhritic (so an sp?!?) nanna, but having them set to half their scale is eekness (so i have been told. .. If I am wrong, just forget I said it, ya!!)
anyway the map still looks pretty good, it'd be interesting to see what else you do with it!
cya!