A customizable eye material made 100% with Substance Designer.
By using exposed parameters, the eyeball can be easily customized in many different ways e.g. color of iris, size of iris and pupil, the number of veins as well as the level of inflammation of the eyeball.
Also - thanks to functions - the ring around the pupil adjust automatically when the pupil is rescaled.
Rendered with Iray within Substance Designer.