Looking good Michael. I was going down the same route with density attached to a null, but you published first, so you get the credit!
I've also been getting interesting results by modifying gravity as well, I'll post something in the next day or so.
edit: That movie was my inspiration as well
Great..you had some promising stuff there too..keep posting, I think I got an interesting way of cracking up pieces in exact structure, it involves using the hidden csg slice tool and use that on a crack structure made with magic bevel, csg slice will cut exactly
according to the premade geometry, and further down the line you can crack those pieces with voronoi mode, so with that you should be able to desing how the cracks are going exactly by your own design..if that is what you want that is.