Industrial Light and magic has this great tool on their home page that allows you to look threw a little window and see the original film footage before post production. They have worked on plenty of big feature films including Transformers who astound me with the compositing of CGI to live action! I haven’t seen anyone do it to a better standard yet! and whats most exciting so me is they are have worked on the new movie Battleships! which looks absolutely amazing! It’s safe to say these are the big boys!