Using units for scenery

This is a screenshot of an example of how you can use units to form pretty terrain. This set of unfinished night elf buildings cannot be preplaced in the map but if you do the timing right you can order the computer to build all the buildings up to that point and then stop. If you want to be able to walk on the new terrain give the unit classification of standon. Anyway using units as scenery may be useful for many maps but I think in cinematic maps you could really find something cool to do with it.