This is a page of drawings I did just drawing the feet. I think this was an extremely useful excercise as the feet are an important part of a drawing and help to show the weight of the person where they touch the ground.
I tried to show the weight of the feet by using darker lines at the points where the weight was on. I think it works quite well. I don’t know how good it would look if I were to use a similar technique in an animation though.