A further advance of the techniques shown in "Untextured Walls". In this case, you can stack openings in a wall. A nice hack... and correctly done, nearly invisible to the player.
The Granddaddy of puzzle maps. This map won "best use of Forge" in the Bungie Mapmaking competition, and is a treasure-trove of super-cool tricks. Any serious scenario-maker should have this map in their arsenal of tools. (Yes, it's a tool.)
