Angelo Figliola's Page

Angelo,

You should post your question about BSDF files to the new forum here:

http://discourse.ladybug.tools/

If you haven't accepted the membership email that you got, send me an email with the email address that you want to use on the new forum (my email is chris@mackeyarchitecture.com).  I'll be happy to give a detailed answer there.  For now, I'd really recommend learning Honeybee[+] if you want to simulate light diffusing materials.  It has a number of new capabilities over the old Honeybee, particularly related to light diffusing materials.  Most notably, you can now run annual daylight simulations with them.