I worked on Hansel and Gretel: Witch Hunters where, among other things, I was responsible for the ‘Swamp Witch’ digital double, who ends up getting shredded by a very nasty weapon :). The challenge with her was mostly the clothing, which had to match the actress 1:1 so getting every strand and every scrap of cloth to match was a very labor intensive process.  The hair is a mix between a ‘helmet’ for the skull volume, then covered in zfibers from zbrush that were then wrap deformed to low res ribbons for simulation. Thanks for viewing!