The material is a tweaked version of FK Sheer Essential materials.  I often use it as a second layer which when made partially transparent  gives a very nice effect as shiny tights.  I can dig up other Firefly materials that I tweaked and now render very nicely in P13 that give this result.  I know that these are obsolete materials but it makes little sense for me to begin retweaking all of them just to make them work in P14 at this point.

All that said, I happily paid for P14 in the hopes that work will continue and future releases might have a bit better legacy compatibility or some other feature that makes rebuilding so much of my library worthwhile.  It occurs to me that offering a ton of legacy material isn't worth as much if it needs serious tweaking to be useable with the state of the art rendering engine. =(

Molly