I created a tall grey building texture for a wall from this. Now if you look at the general trend in the black-white picture, you can see that certain patterns are too repeating. For an arbitrary-sized building I don't know how to create realistic textures: convex correction for light and user position? I used Photoshop to create this texture but some 3D program may be to better here. It should output the light-processed textures. Can I do the light-manipulation with Photoshop or some other tool and how?