I would like to do some radiosity testing with outdoors scenes and
for this I need to know how much energy comes just from the sun
to the surface and how much from the rest of the sky. All I need is
the ratio maybe for a clear sky and 50% cloudy.

I tried following Ken's links and altavista but didn't find hard data.

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Kari Kivisalo                                          www.kivisalo.net

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