Ok, around 4:50 when you say "Let's jump over to the node editor, and with my monkey selected I add a new material," those two windows (or are they called nodes?) show up, but I've rewatched this part a dozen times now and copied your clicks, and those two windows are not showing up. Do they affect painting? I'm actually trying to get through the lesson that comes after this one, but when I paint on the right side of the screen, nothing shows up on the monkey, and I'm trying to figure out what's wrong.