Odds are every wargamer has at least seen a papercraft building of some sort, from the Games Workshop card-and-plastic-bulkheads scenery packed in with Necromunda through the simple uncoloured folded-paper walls hastily constructed before a game to fold-and glue stuff like Paul Lesack's Heavy Gear Buildings.
The upsides of papercraft are obvious - they're cheap, easy to construct, lightweight and pre-decorated. It's scenery for everyone! The downsides, unfortunately, are just as obvious - they don't have much in the way of depth. Even high-class papercraft like Mr. Lesack's can only have drawn-on detail, less than a couple of millimetres between folds and they become impossible to construct out of normal paper. Those of us who long for more detail may consider recreating the pattern in styrene.