What'd you do? Put it in a model renderer or something?
I choose a build, find the angle and view I want. Clear the bricks and take a picture of the slate map at that angle. I put the build into BLS2OBJ, then open the .obj in Blender. I set up the sun angle and lighting relative to the map's sun. Change the Blender sky to Blue or Green. Get the same angle I did in Blockland, but in Blender. Render the shot, save it. Edit out the greenscreen in Gimp and replace it with the screenshot of the slate map, and I'm good to go.
I think this looks cool.
nice work.
The only problem is that I can't get Blender to have a specular effect on the bricks, for the glare. I can do this by smooth shading the model, but then the bricks edge's are rounded.