
In this link you can see a comparison with the others shaders:
ftp://ftp.berlios.de/pub/worldspace/tmp ... RACION.JPG
Here is the patch:
ftp://ftp.berlios.de/pub/worldspace/tmp ... naert2.txt
You can use for cloth (velvet specially), sun's reflection over the sea..... and others

Regards
Jorge Bernal