[Radiance-general] Defining a textile facade

[Christopher Rush]

A better start would be to obtain test results based on EN 14501 test standards. This would give the direct normal and hemispherical transmission values to help define a trans material. Or does the textile have an "openness factor" defined? This would give an approximation of the direct normal transmission in comparison to the total hemispherical transmission.

How critical is accuracy, and do you have resources and time to arrange for more detailed testing of the fabric and a complex material definition? Or are you just trying to get close enough for comfort?

Can you give a verbal description of the textile? Is it a woven fabric with white threads and some open transparency (eg it is white but you can still see objects on the other side when it's hanging)?
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