Drawn/inked traditionally; colored digitally in photoshop.
I usually don't do fan arts, but I love the turtles! This is the way I would render them if i got a crack at em. I always hated how they looked like frogs with shells rather than turtles, so I gave them more detail to the shells and more pronounced, reptilian beaks with nostrils.
I just light-boxed the original sketch I did here>>> [link]
Finished lines here>>> [link]