" It’s a very special kind of skill; if you’re too loyal to the photo, it swallows you up. If, for instance, in the middle of a whole page of “personal” drawings, there is suddenly a drawing that is too… It’s as if there’s a sudden hole in the page. You have to take the elements from the photo that you need, and retranscribe them through your personal computer, in order to get a personal vision. The same rule applies to drawing from nature. It’s very difficult, but it’s what enables the artist to bring his vision to a work. Otherwise he’s nothing but a parrot, or an ape. [pp. 86-87]
—Jean Giraud (Moebius)
Moebius on drawing from photo reference. Eloquently put.