Hi guys ! Thanks a lot for your support !
@greenimation3D : For the eyes , it was really simple actually. I painted an eye texture quickly in photoshop, and using spotlight in ZBrush, I projected it onto an eyeball, with the perspective off. For the matcap, I used the “ReflectedPlasticB” one, to have some subtle reflection in it.
I can share with you the eye painted texture :
You can find a tutorial to learn how to use spotlight here : http://www.youtube.com/watch?v=062jPkInTEk
Good luck