That's a difficult subject, WandW. Poser shaders can be seen as a program, which could be copyrighted if it's not too simple for that. I assume, for example, that BB's skin shader is complicated enough to qualify as a program which could be copyrighted. 

But we surely have a grey area here.

A ship in port is safe; but that is not what ships are built for.
Sail out to sea and do new things.
-"Amazing Grace" Hopper

Avatar image of me done by Chidori.