Update1: Created a shopfront and another building from terrain.

In photo editing software:
First I took a photo of the front of the building. Extracted a small area of the wall and made a seamless texture (see my tutorial on making seamless textures) and also select the doors/window displays for other textures.
Then I made a height map with the front of the building. To do this I selected parts of the building which would extrude. Starting with the parts that would extrude the most, I coloured them in the lightest grey, and then leading down to the least extruded part, and coloured that with the darkest grey. This takes a little time but it's worth it.

*In Bryce:
*Loaded the photo into the terrain editor and then added the appropriate textures. Added a simple 2D object for the doors and window display and placed them on the terrain. The terrain BTW, is standing on it's end as opposed to laying on the floor.

No proper lighting as such yet, have to build the entire scene before I see which lighting works best.