I'm experimenting with the 3D max Daylight Simulation for LEED 2009 Design and Construction. Acording to the LEED requirements I need to do a CIE clear sky at 9am and 3pm on march. or sept. 21st. My issue is that I don't know what to put in as values for the Diffuse Horizontal Illuminance or the Direct Normal Illuminance. Do you know of any charts where I can look those up? I can use a weather file to get the numbers in the ballpark, but I want to use the correct CIE Clear Sky. does anyone know those values for Pittsburgh,PA?
I found this but on first glance it is kind of intimidating. Maybe I just need to go for it and start plugging in numbers to the big formula.
http://www.esim.ca/2002/documents/Pr...ngs/other2.pdf
Thanks