Creating "Titanic" was an epic technological undertaking, akin
to the building of the ill-fated ship more than 86 years ago.
Digital Domain and 16 other companies created over 450 effects
shots for the film. From state-of-the-art computer-generated
imagery to tried-and-true techniques from the visual effects
tradition, nearly 500 elements were combined in the
freeze-frame below. What's real? You be the judge, and click
on the image to find out if you're right.