I just finished a church with their kits. Since the wall castings are the same on both sides, I decided it would be too difficult to cut out windows to fit closely into each window pane. So, I just went to the web for church window photos, printed up sheets of them and glued them inside the walls. I cannot light the building this way, but you can see a hint of church windows from the outside now. Instead of lighted windows, I am going to put a couple of ITT's church sound modules into it so at least you can hear organ music and church bells.