T.REX: Back to the Cretaceous (1998)

Overview

The film follows a young girl inspired to study paleontology after visiting a dinosaur dig, intercut with dream-sequence recreations of a Tyrannosaurus rex and her offspring navigating the late Cretaceous period.

Native Stereoscopic Technique

Live-action sequences were shot with native IMAX 3D camera equipment, among the earliest commercial giant-screen productions to do so, while the dinosaur sequences combined stop-motion and early CG rendered to match the stereo footage around them.

Because T.REX: Back to the Cretaceous was captured with a genuine dual-camera or beam-splitter rig rather than converted from 2D footage after the fact, its sense of depth is derived from real parallax recorded on set — the same principle behind human binocular vision, where two slightly offset viewpoints are reconciled by the brain into a single three-dimensional image. The IMAX 3D Camera setup used here reflects the state of stereoscopic camera engineering available at the time of production, a factor that shaped everything from shot length to how close the camera could get to the action.

Legacy & Reception

It's regarded as a pioneering title in the modern IMAX 3D documentary genre, helping establish the template later giant-screen dinosaur and nature films would follow for the next two decades.

Quick Facts

• Year: 1998
• Type: Documentary (Nature Doc)
• Stereoscopic system: IMAX 3D Camera
• Director: Brett Leonard
• Studio: IMAX Corporation
• Conversion: None — native stereo capture