>>7521373I'm the one with the shin godzilla. I build mine with foam core and elmer's glue. I cut out walls then measure out a pattern for the windows and cut out the window shapes, and use pins to hold the pieces together while the glue dries when I assemble them, then I cut out a piece to glue to the top to make the roof.
Obviously if I want to make a damaged building, I just cut the walls at a jagged angle instead of doing a clean full wall, but then I have to cut pieces each individual floor too.
I think N-scale come in both preassembled and unassembled packs, but from my research, even preassembled pieces need some work to look exceptionally good.