Thank you! I set it to subsurface mode, or whatever it's called, and then used 3 different fresnel layers on top of the diffuse to give a highlight and outline.
@TomGT Hmm, maybe you're right. I did look through the long list of tips and things people do wrong with their portfolios and thought mine weren't all that bad, but there is definitely room for improvements. Horse update again. I scrapped the horn. The rest of the horse looks too much like a regular horse to be a special…