I love your idea, which I'm mixing with mine: the ability to tint slightly the brows:

I've noted that your idea gives a better result near the lacrimal: in the green circle there's some specular which I find wrong, on the left: no specular effect.

Thank you "Uncle Ghostship" 😁

Note that my setup uses a second layer, to give some slight effect on the skin, easier to control with my toolbox

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