How to achieve this effect

[SepinsCG]

Anyone know how to achieve the effect in the first 15 seconds of the linked video? The part that is stumping me is how the mesh has its smoothing groups after being reassembled. I get that its probably a reversed animation. When I apply a voronoi fracture, you can clearly see the location of the cuts and the object loses its smoothness. Any ideas?

https://www.youtube.com/watch?time_conti...ZehVRDg4io