In RDS they don't call it "anti-aliasing," but rather "adaptive oversampling." To set it, under render settings, select "best" in the little box called "adaptive oversampling." This reduces the jaggies, although it's not the best anti-aliasing I've seen. I still tend to render my images larger and reduce them in Photoshop (or AfterEffects for animations), but using the oversampling option is a good start. I'm still with RDS because Carrara had more bugs than the average bee-hive until Eovia fixed it. Now, I think, the only thing that's holding me back is fear. I think I'm about to make the jump, though.... Hope this helps. - Dex