I'm trying to practice using color more. I was told some of my pencil drawings needed 'more value'. Can anyone explain? I like constructive criticism, but it is useless if I'm too stupid to know what the hell they are talking about. :) I have been adjusting the contrast a bit to make them more visible after I scan them, but it isn't a major difference from how they look in reality. I do worry that I am over-shading. Hmmm. I dunno. Any thoughts?