So its been a while since I've done one of these but... This is something I wish I'd known when I was working on my last full character piece and I've finally put two and two together and worked it out. So I hope you can get some use out of it!
Also in the project file I have included a HDRI map I have made for a current project just so you have something for the eye ball to reflect. The whole project is free for commercial use (if you have any for it, theres nothing particularly special there!).
Any way have fun hope you learned something!
If you get a chance check out my work and other tutorials: benbenton.co.uk
And as ever...
Follow me on twitter for updates as they come @BoBoBenton