I developed some textures in Photoshop, based in real pictures, and a custom filter with an action. I used some brushes for wall cracks. My idea is "simulate" the old "Townscape". I´m working in a lot of new designs and I´ll put here the pictures. Would you like download the builidings ?
By the way, I made this building (and mini) bellow for my Steampunk game Vaporaria. The scale is 1/285