This is a procedural map for 3D Studio Max representing human skin (caucasian only so far, sorry).
It is intended to look 'natural', containing some roughness.
It is also far from perfect. Will perhaps update sometime... and charge a fee... ;-) .
It is scaled to look natural on a human figure of 1.80 meters (6 feet) when real world scale is turned on in Max.

As it's procedural, you may play around with the settings, creating different tones. If you want to do so, you will like to know that the basic maps are the 'Speckle' map in the 'Diffuse' slot of the base material 'StratumGranulosum' and the 'Cellular' map in the 'SelfIllumination' slot of the shellac material 'StratumCorneum'. All others (if not child maps) are instances of these, so to keep all scalings etc. compatible.