Hello, does any one knows what this is
I know there is already a thread about that and I see what it does but how does it work
SSS ???
there are quite a few scripts around that might fit your needs. actually there’s a quite cool “search” function in this forum… you might want to use that one? 
no I want to know a bit of theory about it
what is the principe of it
lol,
ok thought someone could explain it in a few words
anyway the first link is interesting
for those who were wondering like me what it is about:
“All non-metallic materials are translucent to some degree. This means that light scatters inside the material before being either absorbed or leaving the material at a different location. This phenomenon is called subsurface scattering.”