Production began in 1995, when Cameron shot footage of the actual Titanic wreck. The modern scenes on the research vessel were shot on board the Akademik Mstislav Keldysh, which Cameron had used as a base when filming the wreck. Scale models, computer-generated imagery, and a reconstruction of the Titanic built at Playas de Rosarito in Baja California were used to re-create the sinking. The film was partially funded by Paramount Pictures and 20th Century Fox. It was the most expensive film made at that time, with an estimated budget of $200 million. Upon its release on December 19, 1997, Titanic achieved critical and commercial success.