“First of all I’ve made a quick sketch in Adobe Flash. Why Flash? Well it’s a matter of choice. Maybe the main reason that vector-based sketch is very scalable and easy to edit. I drew 5 characters, each in its own layer, placed them so they remained groupped but still their faces wouldn’t be….”
http://www.3dtotal.com/team/Tutorials_3/making_of_the_leg/making_of_the_leg01.php