Awesome 3d Engine, Papervision 3d

Just check it out, run it in fullscreen and be amazed

http://www.rockonflash.com/demos/pv3d/macworld/demo/as3/index.html

For more demos, check:

http://www.osflash.org/papervision3d
http://www.rockonflash.com/blog/?cat=11