Above is a little animation I did in C4D, following a tutorial I found on Youtube. The balls basically start off small and then expand but they’re confined to a invisible sphere which makes them squish.
To create this I used a sphere, Cloner, Subdivision, Random and rotation tool (and created some shapes that are invisible). It was nice playing around cause I had to use the keyframes to make the, expand as well which is something I’m not familiar with.

This technique could be used to full the shape of a FOM shoe.