As for Bottin, he's done some impressive stuff as well, especially Carpenter's "Thing". Thought that was Stan Winston, though I guess he did work on "additional makeup effects" but was uncredited. Those are definitely some of the best horror effects of all time- still hold up. And he also did the "It's A Good Life" segment in the Twilight Zone movie, "Robocop", "Legend" and "Total Recall". So yeah, another damn impressive resume. And guess he did "The Howling" and those effects are supposed to be pretty great but I never got around to seeing it (and IIRC that film came out the same year as "American Werewolf").