It uses vertex paint masks, blue channel is for move amount, green for push amount and red for interval. So through the red it looks like the pieces of the burger are moving independently but it is also important for the other pieces, like the wave movement on the steak. Here is how the burger vertex paint looks like:
@ysalex - Love that deer. What was your approach to the short fur texturing? @Nomad - that's a crazy amount of work, nice job. Feeling that camera movement!
Wow Mr Smo, the sheer amount of detail you've put into that thing is scary impressive! Here's what I've been working on: More stuff in my thread here: http://www.polycount.com/forum/showthread.php?t=130777
Next gen rock right here. But yeah, first finished model I have actually posted here. 1024x1024 maps. Would post them, but you would all cry about the amount of unused texture space