how 2 miror subsurfacescattering human skin in a mirror? I have strange colors. I can switch subsurfscattering off and its shows normal colors. Can blender do it?
If you’re using BI, then you can’t actually do it in a correct fashion when the material is off camera because of a number of limitations that existed since it was developed.
Cycles however has a fully raytraced SSS implementation that should work in all lighting and view cases, this is the new engine that is eventually going to replace BI for a large majority of things.