I remember a post back on the old LW forums about ska plug
I got this Quote "Ska SSS Settings, my object is about 2 meters wide, and I use the following SKA settings.
penetration: from 0.9 to 1.5
quality: 25%
light boost: 100%
and i use enhanced low AA"
Sorry I cant remember who the quote was from.
I tend to copy and paste useful info i find around on these forums into a text file on my desktop called lwtips.txt.