IMAX Magic Carpet is a large format film system, using two IMAX 15/70 mm film format projectors. One of the projectors projects onto a screen in front of the audience, the second projector projects onto a screen under the audience, which is visible through a transparent floor. The system was demonstrated in Osaka in 1990, and two films were produced for the format; Flying Raft and Flowers in the Sky.
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IMAX Magic Carpet Wikipedia(Text) CC BY-SA