ok, the author of the pic replied, and he told me he did it in Cinema 4D!! well, I'm already using Poser and Vue D' esprit, I donm't really know if I want to add a third program for my renders... like, posing in Poser (duh), making the depressions in Cinema 4D, and rendering in Vue... hmmm.. I'll try the Deformer and the magnets in a real bed and see how that goes... so far, the results obtained with the Deformer are enough for me.