There are photorealistic skin textures for Posette in freestuff, just look for SandTyger, and momodot has given me some morphs to smooth out the line along the rib cage.  Other than that, I doubt that any othe figure could give you more realism.  I've got a couple of Eve 4 figures that might have better looking faces, but then they've been modeled after real people, using photograph comparison.  If you would like, I can send you them.
David P. Hoadley
P.S,: You need to shorten the buttocks and thighs on the y axis.  Posette's legs are too long in proportion to the rest of her body.  Also shorten the shins too, just a tad.  Ditto with the shoulders and forearms on the x axis.  In some casis, as with my Marie character *see link posted prior in the thread), the abdomen and chest need to be lengthened in the y axis, and the neck shortened.  See if these adjustments don't cause for a more pleasing and realistic effect.  If seen on other sites great realism achieved with much less mesh than Posette's.  It's not the number of vertices that count, it's what youdo with what you have.

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