There is no such thing as "moving infinitely fast", that's something the other person made up. What if light didn't fly straight and made loops and flowed like

There is no such thing as "moving infinitely fast", that's something the other person made up. What if light didn't fly straight and made loops and flowed like water and clustered up and stuck together? If you're going to make up nonsense, you're not talking about physical reality you're talking about cartoons or magic and fantasy. When something moves fast in photography it has motion blur and that spreads its coverage over a larger area. In this demo the motion blurred 'torus' and 'sphere' both get made artificially more opaque to make the animation work. You can see it happen.