Most previously posted elsewhere.
[All .gif transformations were created from photos found via DuckDuckGo image search. Photos for top morph were stolen shamelessly and without permission from Dan J.]
[Top: I rotated & morphed the negative image of the snow shadow. Bottom: Original image found here.]
Update: FWIW, here’s the positive of the morphed image:
2nd .gif found here,
Third .gif was cobbled together from a video of a computer-generated humanoid that taught itself to walk, then run, by trial and error.