[Radiance-general] Modeling a film w/ 50% haze and 91% tranmission.

[Christopher Rush]

ASTM standard D1003 defines the method for measurement of "haze." According to this document, haze is defined as T-diffuse / T-total
http://www.hunterlab.com/appnotes/an05_97.pdf
That could help in guessing at a trans definition, but accuracy would be unknown.
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