The sunken city visited by the Mariner and guest consists of elaborate miniature buildings shot in smoke to simulate the opacity of water. Shots of Kevin Costner and Jeanne Tripplehorn were filmed separately inside a water tank used for astronaut training, and composited into the underwater shots; computer-generated images (CGI) were used to add water ripple effects and bubbles. One of the buildings was a miniature of a local donut shop, jokingly called 'Mike's Donuts' in honor of visual effects supervisor Michael J. McAlister (Mike), with a big life preserver on top instead of a donut. Another miniature is a sunken version of the 'Orca' from Lo squalo (1975). These miniatures were combined with backgrounds of a digitally edited Denver, Colorado. The "Norwest Building" (roughly shaped like a cash register) can be seen in one shot.

Film

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