Random craters!!! Because this is what you all want, obvs. If a vehicle map is desired, there's a map option to add ramps in & out of craters. Much of the code is to find a nicely symmetric map given the number of allyteams and teams, but symmetry can be completely disabled with a map option. Be patient with the map generation. Your game has not frozen, it just takes a bit.
http://springfiles.com/spring/spring-maps/loony-bin-1
AIs do not play on this map because they don't recognize the metal spots.

(no, no, i'm sorry, it doesn't come in multiple colors, it was just a way to differenciate the slices)