its a realy cool engin that all the futur games are going to use!
find out more at http://www.idvinc.com/speedtree.htm
look at some pics frome it you can have millions of phisics enabled trees at once!
some from a game caled oblivien-its all about the trees. they are directly from the game
http://www.eagleimg.com/up/34672.jpg
http://www.eagleimg.com/up/34673.jpg
http://www.eagleimg.com/up/34674.jpg
http://www.eagleimg.com/up/34677.jpg
http://www.eagleimg.com/up/34678.jpg
her ar some from unreal-
http://www.eagleimg.com/up/34679.jpg
http://www.eagleimg.com/up/34680.jpg
http://www.eagleimg.com/up/34681.jpg
http://www.eagleimg.com/up/34683.jpg
http://www.eagleimg.com/up/34684.jpg
http://www.eagleimg.com/up/34685.jpg
http://www.eagleimg.com/up/34686.jpg