The movie was magnificent and the CGI was necessary to create the illusion of the period. Things are shot inastudio so you can control the lighting, the sound and the cameras which you simply cannot do on location. In “Gatsby” the effects supportedastory unlike “Man of Steel” or “Into Darkness” where the story was an excuse for special effects. Some produce art and others produce product and hollywood generally produces the later. “Gatsby” wasabrilliant exception.