How to define glass as the real situation?

Hi, all,

I'm simulating daylighting problem.

How to define glass as the real situation? I mean the trasmittance,
absorption, reflection are all under consideration. or what material should I
read?

it's perfect if have some example lines.

Thank you for your help.

ZZ

Do you know the tutorials?

E.g.

http://luminance.londonmet.ac.uk/learnix/docs.shtml

and of course those from radsite.lbl.gov?

CU Lars.