Master copies are good. I haven't done a lot, because I'm a lazy bastard. But whenever I do, I always have moments where I think, "Ah-ha, that's how you do it." A good instance here were the nostrils. If you look at the original, you can see how warm he paints the nostrils. This makes sense because the skin is thin and light shines through and colors everything red. Think holding a flashlight up to your hand. There were lots of very warm places, mostly in the skin folds. I'm gonna do more of these, always a good art workout. Anything you wanna see me try to copy and eventually throw cadmium red on top of?