I hope I can answer this correctly, Face_off would be much better at the technical side, but since he's getting married, I'll try my best ;-) Real Skin Shader is a one size fit's all kind of script and script only that will add effects to most models. With HyperREAL we were able to include texture specific items, such as alpha maps for spots, specular and sss, lip gloss and tone/brightness adjustments. With the inclusion of alph maps, it sets up a more complex node system that Real skin shader does not. Paul did update Real skin shader with some of the tricks of HyperREAL, but couldn't include the texture specific items since it's script only. Personally I like to use both. RSS on models such as V2, EJ and such. And use HyperREAL on V3 and M3. Hope I helped a little bit ;-) Sincerely, jeni