Thanks for the breakdown of the eyes. Things I really like here is the subtle noise arounde the cornea on the outer eye mesh, whereas the reflection on the bulge of the actual cornea is smooth. Cool touch for realism.
I’ve also done the fake depth of the iris and pupil with the height map for the parallax effect, but I get artifacts on grazing angles. So I’ve ended up modeling the concavity, but the downside is there’s no proper refraction in a real-time rendering, but maybe someday we have! ;D
I see you used the specular workflow instead of the metalness workflow. I wonder if that specular map is used in the metalness workflow.
Did you place the wetness mesh between the eye and lower eyelid? (You seem to have a small gap between the lower eyelid and eye, but as far as I know there isn’t a gap. But it’s only visible from the side view you have there) And shouldn’t the wetness go around the eye and cover the lacrimal caruncle as well? Being a bit nitpicky here, even though your work is amazing.
This is a breakdown of another artist and he made the wetness to go around the whole eye including the lacrimal caruncle, and he also had an AO ring.
In my opinion the AO ring isn’t necessary, because your real-time renders look really good without it. (;
EDIT: BUT, the shape of your wetness mesh is more accurate with reflections, which gave me an inspiration. Thanks for that.