I know this first part sounds pedantic, but bear with me. You can't use a "film" projector for this, because there's no physical film strip. So this can only be

I know this first part sounds pedantic, but bear with me. You can't use a "film" projector for this, because there's no physical film strip. So this can only be done in a theater that has a digital projector (or can have one set up, if it's not usually there). The most widely used "3D" digital projector for theaters runs at a "refresh rate" of 144Hz, alternating between left-eye and right-eye. Refresh rate is not a frame rate, which for movies is typically still 24fps, but flashing the same frame on and off more often than 24Hz reduces the perception of light/dark "flickering". I assume that digital projectors can support a frame rate equal to their refresh rate, but I may be mistaken. https://en.wikipedia.org/wiki/RealD_3D https://en.wikipedia.org/wiki/RealD_3D Actual film projectors are incredible engineering - the film actually has to stop for a split second on each frame while the light shutter is open. For understanding film projectors, I really love sharing this video with my friends: https://www.youtube.com/watch?v=En__V0oEJsU https://www.youtube.com/watch?v=En__V0oEJsU