how about a teleporting exit/entrance. this would allow for a path that could cross over itself. i got this idea looking at the 'twisted knot' map. you could have the creeps head toward the 'fake' exit, or the real exit, whichever is closest. if they get to the 'fake' exit, they are teleported to the 'fake' entrance, then head to the real 1. this would allow for reverse creeps. you could have them be a different color so players would know.... perhaps orange/yellow?

I love this idea!. That would make so many more possibility's for maps. :D.

bump.... for sparticus' sake.