was this rendered in Blender Cycles? Great Render! I like the skin like oil ans sweat on the thighs!
The "test" have a good "taste"!!
I found a little fix for the eyes, if your use the MMD Tools Poupi branch, you can set the "back eye" material to "Linear light" so that the dark shadow of the cornea can be a lighter color.
It is located under the "mmd basic shader"---"Mix"--"Mix"
Change the "Mix" to "Linear Light" and you will see a difference. I hope that helps.