Factoid
The first 3D projections used a shutter system with alternating projectors.
(
Bad Horsey Bring back Dr. Ubes Rub!,
Mon 1 Sep 2003, 16:44,
archived)
they still do
try an imax 3d film - but they are soo fast it's perfect
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Darkedge,
Mon 1 Sep 2003, 16:45,
archived)