Actually, I need a solid boolean of the head; the idea is to mimic one of those ancient Giant Head sculptures in Mexico. I want to add some boolean "Ching-gowas" (technical term for dents, chips and breaks) to make the head look old and shattered. Here's what's really strange: I ungrouped the lot, selected only the large head part, made it positive and used only it and the cube to do the boolean and the neck still rendered weird... without even being a member of the booled group! Is this a Poser specific problem? Seems I've booled .obj's and the like (stuff from the web) without this happening. I'm going to experiment some more. More to follow...