There's some information on: https://www.smashingmagazine.com/2017/01/illustrating-animals-13-circles-drawing-tutorial-challenge/ https://www.smashingmagazine.c

There's some information on: https://www.smashingmagazine.com/2017/01/illustrating-animals-13-circles-drawing-tutorial-challenge/ https://www.smashingmagazine.com/2017/01/illustrating-animal... "While sketching, I kept track of the number of circles I was using, counting one for every curve." After sketching an animal, it should be easier to adjust the image by inserting/removing/moving circles.