If I draw an imaginary character and use a photograph as reference for human body/pose, is that legal, copyright-wise? Let's say I change the hair and the face? I know it needs to be 80% different, but not sure how much % a figure pose is worth. Basically, the pose is the only thing that would be the same.
Country I'm in (for laws): USA
(posted this on arts and crafts originally, but they said it's better posted here)