
Here's another not-quite-new one that I just redid, an old one of Doc that definitely needed revising:
http://yamihoole.deviantart.com/art/Doc-Hudson-130958421
http://yamihoole.deviantart.com/art/Doc-Hudson-130958421
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kinda like that paradise falls concept art for Up with the gang standing together on a rock in front of the falls.
I learned the most actually from this "How to draw real people" book i have.