When I say transparency, I mean a a very small bit of the skin color map (since the tattoo does lie about 1mm below the surface) and more from the specular and bump maps since these features are truly above the tattoo.I definitely agree here that blending with the tattoo at a low value thereof is incorrect.  The epidermal layer is very translucent and the coloration stills shows vibrantly in a relatively new tattoo and doesn't fade extensively with age (all things considered of course).

C makes it easy to shoot yourself in the foot. C++ makes it harder, but when you do, you blow your whole leg off.

 -- Bjarne Stroustrup

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