I don't think so, for me the illusion is not just uniformly upwards throughout the cycle, but also includes a sudden downward shift, so its more like sawtooth m

I don't think so, for me the illusion is not just uniformly upwards throughout the cycle, but also includes a sudden downward shift, so its more like sawtooth motion illusion., so if it were to move down I predict it would look more like a somewhat static diamond jumping down in steps... it would be interesting to try in order to determing the exact illusory motion profile, if it doesnt seem static between the jumps but seems to wiggle up and down before jumping... Edit: if someone would try this, I would recommend using a larger diamond with thick enough edges and viewed from a distance such that pixelization effects are ruled out...