Jo there is a way to make items disappear (to you anyway) I'm not sure if it's in all viewers but it is in the phoenix viewer. it's called "derender". I used it yesterday, I was watching a movie at Escapades (they got a mini cinema) and someone stood in front of the screen with flapping arms and such like. I did a right click and derendered them and they just disappeared, although I could still hear them and everyone else could still see them I think, but at least I got to enjoy actually seeing the rest of the movie