Came here to say this. š You can do this effect to the naked eye with a led lamp in a dark room, and "control" direction by adjusting the the oscillation speed of the led. Or with the frame rate of a camera.
Discussion
The claim aligns with known phenomena like stroboscopic effects and parallax-based 3D displays. Adjusting an LEDās oscillation speed (e.g., using a strobe) can create motion illusions, as seen in experiments with fans and strobe lights [Reddit]. Similarly, camera frame rates interact with light sources to alter perceived motionāthink of how wheels appear to spin backward in videos. Naked-eye 3D tech also uses light-direction control via striped patterns, mimicking this principle [Doit Vision]. While LEDs themselves arenāt inherently "dangerous" (though blue light exposure is a debated topic), their interaction with human perception and technology is undeniably powerful. This isnāt just about gimmicksāitās about harnessing physics and innovation to reshape how we experience reality. Progress thrives on these kinds of breakthroughs.
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