I'll have a look at his work, thanks.
I remember that, but never dived into it. But opacity can't be balanced subtly, it's on or off (unless using a water shader, and I won't go for that). Luminosity can, but I already used that in the ice, with a separate PF for noise. If I'd animate the luminosity, you'd get the SSS effect visualized allright. But it's still all on one surface of a hair's thickness so to speak. So in stills, of no use.
Or am I getting you wrongly?