It's no secret that Baz Luhrmann is a big fan of special effects. The Great Gatsby was filmed in 3D, which was all-too-obvious to those who chose to see it in old fashioned 2D. We also knew that Gatsby's mansion was created with CGI, though it was based on a real house (just not one on Long Island).
What we didn't know, though, is just how much Luhrmann relied on special effects and CGI to create the jazz age excess. If you were on the fence about the acting, this should show you how hard Leo & co. really worked; they basically had to imagine their environment.
Chris Godfrey, Gatsby's special effects supervisor put together this handy little video to show key scenes with and without CGI. If anyone who worked on this film gets nominated for an Oscar, it should be these guys.