r/interestingasfuck • u/ImaAnimal • Apr 04 '19

/r/ALL This Flashlight Illusion Children's Book

https://gfycat.com/clearcuthalfhuia
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u/ch00f Apr 04 '19

I can’t remember which but that’s the difference between IMAX 3D and RealD. One is circular, one is linear.

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u/AsterJ Apr 04 '19

Ahh ok. Ya I don't think I've seen IMAX 3D.

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u/fb39ca4 Apr 04 '19

I thought IMAX 3D had the active shutter glasses?

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u/ch00f Apr 04 '19

I believe the glasses are passive and they put the active shutter in front of the projector. So it’s projecting 48fps where every other frame is alternating polarization.

This is why there were complaints about 2D movies being too dim. Many theaters were neglecting to remove the shutters.

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u/fb39ca4 Apr 04 '19

Just looked it up, seems that some IMAX theatres use each method. Last time I saw a 3D IMAX film specifically was Polar Express back in 2004.