For that, they can keep the glasses.
It’s not rocket science to produce a 3D movie — all you need is the same technology behind Viewmaster sets, and for your audience to be able to cross their eyes or look wall-eyed at something. It’s no big trick — I’ve done it myself. To produce a 3D movie showing on one screen is trickier, and you’ll need glasses.
Assuming you want to make a 3D movie.
I can’t imagine why.
It still pretty much seems a trick (I’m an old dog). But (shrug) if I could get people to pay twenty bucks for it, I would.
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