VIDI added a new Phong shader to Presenter 3D that provides extremely fast rendering speed. Users like Bob Sauls and Shelly Green say that it's faster than Electric Image's Phong shader and Eric King says the speed is "downright scary". It offers antialiasing and texture mapping, but no shadows.

But seeing is believing. If you don't have Presenter 3D yet, download the demo version and give it a try.