some more basic information on Avatar

Avatar was officially budgeted at $237 million. Other estimates put the cost at $280–310 million to produce and $150 million for marketing.^[12][13][14]The film was released for traditional two-dimensional projection, as well as in 3-D, using the RealD 3D, Dolby 3D, XpanD 3D and IMAX 3D formats. The film was touted as a breakthrough in filmmaking technology, for its development of 3D viewing and stereoscopic filmmaking with cameras that were specially designed for the film's production.