Yes, sailor_ed, the image I posted is by Jensen - so I guess it makes sense :-) Thanks indeed for the insight, charlesb. THis is very interesting and what I wanted to hear. Sorry that some people here seem to have a problem with anybody asking questions. Sorry I don't share your blind enthusiasm; as I said several times, I was very disapointed with Carrara 4 and SSS is the only thing of real interest to me in C5.