Great literature seldom makes great movies, and Baz Luhrmann’s 3D remake of F. Scott Fitzgerald’s “The Great Gatsby” only serves to prove the point. In any event, Luhrmann, who’s madly in love with his own status as a visionary, was absolutely the wrong director to try. This adaptation of a major classic forgot to take its Ritalin. Luhrmann is a love-him-or-hate-him director, prone to over-the-top visuals, swirling cameras, anachronistic music and a ton of CGI. The approach is absolutely wrong here, and the 3D only accentuates the surrealism of the imagery. But the biggest problem is less technique than ego. Lurhmann seems to think he can improve on a book regarded as one of the great American novels, and he can’t. He doesn’t even particularly seem to understand the material. “The Great Gatsby” hasn’t been interpreted here so much as it’s been chewed up and squeezed through the alimentary canal of a psychotic monkey with an acute case of dysentery. As the title character, Leonardo DiCaprio, like Robert Redford before him, looks great in the period suits. DiCaprio’s manner is startlingly affected for most of the movie. Tobey Maguire’s Nick Carraway, the story’s narrator, is less a Greek chorus, or even a character, than simply a voyeur who happens to be on camera. Carey Mulligan, a fine young actress, emerges a complete nonentity here. Towards an end that’s been too long in coming, Luhrmann superimposes words from the book itself over the green light at the end of Daisy’s dock. It only drives home the ironic point that Fitzgerald’s words were better than anything that’s been on the screen for the past two-plus hours.