Shading and highlighting are left relatively unchanged - there is a bit more highlighting on the forehead (which may look a little strange on very light sims in certain lighting), but I have added no shadows.
I've also tried to blend the lip texture more.
This is unfortunately fairly subtle, and I'm still working on a better solution for this, but (IMO) these are an improvement, even if it isn't a dramatic one. Increased texturing on faces - So they're not so perfectly smooth and featureless. I have tweaked it toward good appearance when in-game, on lots and in the neighborhood - the side effect of this is that the already-waxy look of sims in Create a Sim will be even greater (especially on darker sims), but the look is improved everywhere else. This is a set of mix-and-match packages that will allow you to independently change three main aspects of your sims' skins: Increased shine - Applies a greater level of shine/sheen to both bodies and faces, making sims look a bit less like dead mannequins.