How to create textures for realistic 3D eyes


In my illustration of Boudica, Celtic Queen of the Iceni tribe, a lot of care was given to the intensity of her gaze and the vivid colours of her irises in order to attract the viewer’s attention

Most of my characters use the same eye model, recycled from one subject to another. So as to not change textures each time I begin a new project, I have spent some time creating a set of simple shaders that allow me to modify the aspect of the eye in a parametric manner.
The obvious first thing is to be able to quickly alter the most identifiable aspect of the eye – the colour of the iris.

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