There's a book "Drawing on the Right Side of Your Brain" where the author shows before and after self-portraits made by students who attended her five-day (40 h

There's a book "Drawing on the Right Side of Your Brain" where the author shows before and after self-portraits made by students who attended her five-day (40 hours) drawing course. The difference is immense -- childish drawings before and good realistic portraits after. And she shows the whole group, not just a few prodigies. The whole idea of the book is that drawing is not hard -- the hard thing is to see what is in front of your eyes as opposed to what you mind thinks you're supposed to see. (And this, of course, applies not only to drawing.)