Okay, here's the link. Please be advised it contains CG untextured breasts in motion. You have been warned.
It was done in Lightwave by Umemaro, but that's about all I know (I use XSI, and I cannot identify his process). The main thing is that in his finished animations the breasts fall, flop and deform according to gravity and whether they're fondled or not.
I don't know how much that picture actually relates to his regular process. I do know that judging by how 'realistically' things move in his animations, he is either an amazing animator OR he is using some kind of gravity/softbody/liquid system. I doubt he is using springs or cage deformers/lattices. It's hard to make things 'flop' like that and preserve volume like that.
Do you know his secret? Or can you accomplish the same? I know I'd love to hear it if you do.
Btw, I know I run the risk of derailing this thread into juvenile accusations and mudslinging by focusing so much on breasts (it has happened before in other places) but I think/hope people here are a bit more mature. Besides, the techniques can be applied to a lot of other things.
The picture is from Umemaro's blog. He does CG pornographic animations which display a surprising amount of technical ingenuity. So if you're not offended by such things, taking a look at his works might be interesting.