@ghostships:  the renders look very good.  You would think that the high radius values would look white in the render as you assume, and do agree that is what is expected.  I ran a test render with 2 exact figures in one scene but varied the radius values and I observed that the high-value character exhibited a lighter tone than its counterpart that exhibited a warmer tone.  Which one is correct? It's a matter of personal taste at this point.  However, through some of the comments posted on some websites, the degree of SSS is also dependent on mesh size, the larger the figure, the greater the values.  That makes sense because of the behavior of real-world penetration of light wavelengths into the skin.  The chart I posted above is based on real-world values by scientific observation.  Consider them as a guideline and modify them as needed.  For example, if you want to create a Vulcan character, you would modify your SSS color and radius to reflect a more green tone simply because the aliens themselves contain copper-based blood that is green in color.