This could be used for RPG's or any other kind of map....Basically it's a night/day system. If an RPG was set up for vision with a certain kind of unit...or building instead of map revealers....and if the unit that would give players vision could be disabled.....you could make a night/day change in less than a minute. (depending on how much units/buildings you want disabled.) This map is a simple example of how it could be easily done. Basically it just requires 2 locations...and four triggers.
This has been done before.
Ya its for thouse who don't know and i think beginers would like this. remember they are the future of SEN and mapmaking without them SC would be messed over.
What is the point of disabling them? And what use could this possibly have for a game?
You only need to use 1 location to do it.
Here is version, so you can see what i mean...
id personaly use burrowed ling / defiler under the main hero for day/night. sounds and some other ambient stuff.