Attached Link: http://www.eovia.com/carrara/product_info_car.jsp

It is a big step forward, especially the rendering (C2). That Global Illumination thing everybody raves about is beautifull to use on Poser figures. You should not throw away your old RDS if you buy Carrara if you love to do Boolean stuff. That got worse. I still am sad I actually DID delete the prog, for that reason. Subdivision smoothing is cool. And tons more. You could check the specs at the link. The difference between RDS and Carrara 1.1 was not very big, if I remember correctly.