Here's my anim . Watch out, it's 500ko ! Two keyframes, but i used a trick : i've put an oscilate tweener, with some dampening, in the z position of the sphere . I've used some motion blur, too . For saving, i've rendered in animated gif, and Carrara saved it in the "Metatemp" directory . Weird ! I hope this bug will be corrected in the patch : i've lost an hour just to figure out how to render the gif file ... litst