I'm still testing demo version of KeyShot 5 with Animation Add-on.
I do not know how animation works in previous versions of K/S but this tool seems to be quite ok.
http://www.allure.cz/upload/animations/threeofthem.html (http://www.allure.cz/upload/animations/threeofthem.html)
No afterefects applied, just KeyShot.
Models from Rhino.