That'll be tough without an actual degree, at least in the US. There are quite a few ways to do it, but without a degree you'd likely need 12 years of experience.
These are a set of 12 buildings pre-assembled. I've already got a modular city kit on the store now, so I'm doing something a little different with these.
I thought you guys may like this, being into animation and game art and all that rubbish. http://www.rockpapershotgun.com/2010/03/12/i-spy-a-brink-trailer/#comment-415048
http://www.bscreview.com/2010/12/stargate-universe-cancelled-by-syfy/ Honestly I didn't like Universe nearly as much as SG-1 (or Atlantis), but it was the only Stargate still being made :(