Hi Booleano

> This example is not mine, but I think it was done with the Flow function, but how?

The completed soccer ball here was not done with Flow, because doing Flow from a plane onto a sphere will have compression in the deformed objects at the "pole" areas of the sphere.

But you can construct a polyhedron from a flat pattern by using Transform > Rotate > "Rotate axis" along with some construction circles to snap onto.

The technique is shown in these previous discussion threads:
http://moi3d.com/forum/index.php?webtag=MOI&msg=2140.46
http://moi3d.com/forum/index.php?webtag=MOI&msg=911.11

- Michael