In the Labyrinth
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In the Labyrinth was a groundbreaking multi-screen presentation at Expo 67. It used 35mm and 70mm film projected simultaneously on multiple screens and was the precursor of today's IMAX format.
In the Labyrinth was co-directed by Roman Kroitor, Colin Low and Hugh O'Connor and produced by the National Film Board of Canada. Kroitor left the NFB shortly after to co-found Multi-Screen Corporation, which later became IMAX Corporation.