tgz, thats a good technique I do that too- whats good to do is make a new layer with grey and set it to saturation over the picture, then inbetween those layers make an overlay layer and paint with black and white to pick out the important areas and define stuff. then take off the saturation, maybe tone the overlay down…
While confident you may have something interesting here, this is a huge mess of noise. Things that will help: Get some lighting in here to break up shapes, Put the camera in game play positions so we can see the detail levels the way the player will see it in game. Highlight edge and shade inner corners with more…
it's a box-map nightmare! At the moment, your main building looks like someone has built it like they build a dry-stone wall : roughly-hewn stone piled on top of each other, and held together through gravity, luck and faith. before you start worrying about lighting, or even the contrast and detail of the textures…