I want to gif capture it and calculate the phase shift. My assumption is its either 180° or 180±A° where the effect only works if A°<B° where at B° the train would appear to be blatantly going a specific direction.
edit: or its possible that various frames are varying phase shifts which creates the bidirectional effect. Such as:
Frame 1: 0° Reference
Frame 2: +10°
Frame 3: -10°
Frame 4: etc
and your mind just chooses one. Donno, fun to think about.
Would be so easy to figure out but I can't be bothered
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Easier to speculate.
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