Originally Posted by
Packetdancer
Anything else aside, I will note that the aurochs/grand buffalo wandering past the pasture fence was extremely hard to ignore when it happened. ;P
If you examine the actual geometry data for the city, a lot of buildings are almost certainly one-sided facades and such; if you can't get to an area, it doesn't matter if you can see 'behind the curtain', as it were. Anything else aside, to allow flight they'd either need to add a bunch of new stuff to the actual city geometry (so that you couldn't see through/behind things into the Void Beyond the Map, where C'thulhu-like renderer bugs live and feed upon the unwary), or slap on a flight ceiling so low people would complain that flight was pointless.