I'm making map(s) right now since I can't get online to play atm. If anyone wants to watch here is my stream:
http://www.livestream.com/sporcharliemurphy
on topic though, charlie, its just like in the war3 editor. u must make the maps bigger than the actual play area cause since its 3d u want a part of the map to "go into the distance" insead of just chopping it off cause it looks dumb. The editors are designed that way so you need to redo it on a bigger map size and just make unbuildable "decoration" terrain on all those red areas.