So the other day Evil Genius posted a a link on his blog about a Asteroid Tutorial on his web site. Which is convenient as I said on his blog since I have a image I was working and The old asteroid field I had using an old tutorial wasn't so spectacular. I like the new tutorial which I found an almost exact duplicate of.
http://www.youtube.com/watch?v=7hIQemrsANU
http://www.youtube.com/watch?v=f3q29W19rwE
Anyway. I made an asteroid and asteroid field to test it so here you go.