Originally Posted by Drithius
At least one scene is pre-rendered. Most are not.
Try it out with the Kayran armor - the big Oompa Luumpa looking thing. That's how I noticed it the first time: I was staring at some form of striped sleeves and my head wasn't covered in rags. I can't recall which scene it was, but it was early in the game and obviously after killing the Kayran. I eventually upgraded from that armor to armors without the headpiece so it wouldn't have been as easy to notice, nor did it really bother me.