Yes I had to notice the probleme of large open areas. the triangles are too big and do not stick any more on the ground, on LOH the bots can not to cross the space which separates them from the controle point, they stop in the medium of the road, and go back in "back-slide"...:/
I do not know if you knows this tuto on Maya:
http://members.iinet.net.au/~kyron/page4.htm
I have not Maya but I think that it is not very different of 3DSMAX.