Ball Action is not going to do that for you without advanced techniques. Ball Action tends to explode objects rather than assemble them so you need to know how to build the effect, precomp it, and then run it backwards by time reversing the comp. Ball Action is not very subtle. When you change the ball size and gride spacing you don't get smooth transitions. It depends on weirdly incomprehensible adjustments for twisting along different combinations of axes in varying degrees. You can spend hours (I have) playing with these and never make ay sense of them (I can't).
I hope you will explore Ball Action, it's one of those great simulations that tends to get overlooked. But you may end up using Shatter and running it backwards using time reversal. Shatter's physics are deisnged to blow things up with explosive force so carefully ramping them to assemble something backwards is counterintuitive. I usually end up using both Forces to make that transition.
Ball Action is featured in prescious few tutorials. All you can do is hit YouTube and Vimeo and carefully search the AE clips. There are better tutorials at the usual AE support sites but only a few and they tend to be specialized.
Try to have fun with Ball Action.
Message was edited by: bogiesan
That is one of the better tutorials on this obscure filter. There used to be a good movie on the Cycore site, too, but I think it's long gone. Same with the original Final Effects VHS videos from Total Training, long gone.
Thanks for posting the link!