Ha, you don’t know how I would LOVE if I could do that! The problem is most of the people will be using their own cameras (phones, point and shoots etc). And if the costumed characters or the guests are wearing green that would be a keying nightmare. I have no control over the things that would be important for a green screen setup. Green Screen would be awesome. The client wants the costumed actors to have an “epic-styled” action background to add to the theme of this event. The actors will be in full “Avengers” costumes. (Hulk, Capt. America, Black Widow etc.)