Zed A. Shaw, Painter

Unusual random thought on visual perception and movies: When visual images are missing element (like turn your head too fast) your brain fills in the missing time to make it seem smooth. That probably requires effort. I believe that 24fps is right at the edge of this effect.

So if it's < 24fps your brain can't fill in enough information between frames to make it seem smooth. If it's > 25 then you brain has enough information that it doesn't need to do any work at all. 24 is right at this sweet spot where your brain needs to works, but it's smooth.

So, I think that requiring the brain to continually inject frames and do work while viewing 24fps, but not so much that it can't fill in frames making it jerky, results in an impact on cognition similar to hypnosis because you have to concentrate to view it, and it's rhythmic.

I also think that this "injecting of frames" causes a perceptual effect that prevents you from seeing flaws because your brain is basically injecting lies and ignoring things to keep up. Once you hit 30 or 60fps a lot of this effect disappears.

At say 30 or 60 I think your brain has to do no real work to comprehend the motion, and so you can focus more intently on flaws and you don't have to concentrate as hard so it has less impact on you than 24fps. So, how could you test that?