I made this video for our SIGGRAPH 2012 Talk - "Efficient and Seamless Volumetric Fracturing".
The skull geometry was fractured into 80 fragments, it took less than 0.5s per fragment. I rendered the fractured skull through out the whole movie, there is no swap between the unfractured and fractured model. As you can see it is absolutely seamless, no visible fracture lines at all. The RBD simulation was done using Houdini DOPs and it was rendered by Mantra.
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