Just saw this and anything like from short tutorial to simple tips to understand how to do semi-realistic/realistic things. Since I am kinda tired of manga even if I like the style, and if I ever do serious commissions, I'd love to do something more realistic >< I am constantly trying to move from lines, simple shadows and same style to no lines, more complex shading and lights but...pft I am missing a lot there.
I don't even have much of a clue since what I see from people's shading progress/refs/wips looks already soooo different from my weirdo shadings :'D