How about a correct sunlight model ? :)
Posted: Sun Jun 24, 2007 9:13 am
Should we have one.. yes ofcourse! and to get one sunlight should cover these parts of the spectrum 
http://www.noao.edu/image_gallery/html/im0600.html
/ Max
http://www.noao.edu/image_gallery/html/im0600.html
/ Max