Quote - i think the Gen2 female and V6 in particular need some postproduction work on the eye ,more than V4 and gen1

For now using defaut shaders (like Bree one or V6 one) the eyes  seems unnatural, a little bit strange

I have definitely seen this problem with the V6 eyes and not so much with the default Gen2 female eyes. I started a thread on the DAZ forums about it, but didn't get much response. I'm glad someone else has noticed.

I have stopped using the V6 eyes, but replacing them is a little tricky. Gen2 has an EyeReflection surface and the default V6 material attempts to add some reflections in the EyeReflection surface which IMHO are part of the problem. When you use a preset to change the eyes, they don't change the EyeReflection surface. You need to go set the opacity and reflection strength back to 0% on the EyeReflection surface to get ride of the reflections manually.

I think the SSS is also way to high in the eyes of the default V6 texture. The eye textures already have the SSS effects built into them. If you change eyes though, most of them are using shaders without SSS, so changing eyes fixes that part of the problem.

Even after fixing the EyeReflection layer and the SSS, the V6 eyes don't look good at some distances. The irisis seems to fade into the white of the eye too much. I think this is a problem with the eye texture. If you fix the EyeReflection surface and uses eyes from some other character, they will render like you expect the eyese you are using to render.