Whoa, this looks amazing so far, very realistic! :O I never tried this reversed drawing technique, white on black! The amount of detail is just awesome! And it's an interesting question, I used to copy from photos a lot as well (e.g. my butterfly drawing)! I think I learned how to draw a lot of things when copying photos! :) It makes you think about what you see (all the shapes and colors...) and how you could transfer it to paper/canvas so that it looks as realistic as possible!