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  • $\begingroup$ it looks like it's contracting itself? so maybe curve modifier and scale on one axis? $\endgroup$
    – moonboots
    Commented Jul 12, 2021 at 19:31
  • 2
    $\begingroup$ Have a seven foot eastern brown living up the back. It's idea of defensive is getting on its tail chasing you and biting you in the crutch. Agree this isn't a dupe (my answer there is more for trains) however IMO if intention is animating, rigging the snake is a good place to start. $\endgroup$
    – batFINGER
    Commented Jul 14, 2021 at 13:41
  • 1
    $\begingroup$ I have no solution but I will share my observations. This seems to be a regular "forward" motion of a snake warped around into a circle. Snakes can generate waves but they cannot move forward in the absence of friction. These waves appear to be similar to peristaltic waves, muscular contractions passing down the length of its body. If friction is added the resulting force is towards the center. The pattern created is similar to those of ancient labyrinths, some interpret these labyrinths as representing an inner journey. Curious! $\endgroup$
    – user5049
    Commented Jul 15, 2021 at 8:57
  • 2
    $\begingroup$ I would try to figure out what the problem is, before looking for a solution. With an image-sequence reference.. 1. Manually rotoscope the changing curve to shape-keys. 2. Try to identify fixed points in the reference, (tail-tip, etc) and animate empties along the changing curve following those points. It may not be the final method, but it would give a clue about what the final method has to do. (After all, this motion has evolved, because, presumably, it confers an advantage by confusing / alarming predators) $\endgroup$
    – Robin Betts ♦
    Commented Jul 16, 2021 at 9:08
  • 1
    $\begingroup$ @RobinBetts This defensive movement causes the scales to produce sound like a poisonous snake due to the friction between them. Observation is very helpful in this case and I recommend slowing the video down or viewing it frame by frame to understand what is happening. Doing a curve 2D animation with Grease Pencil is quite a fun challenge too. $\endgroup$
    – Rumen Belev
    Commented Jul 17, 2021 at 11:41