[Radiance-general] How to describe a diffuse illuminating pane?

[Per Haugaard]

Dear group,

A quick question. 
Which material can be used to describe a diffuse illuminating pane, cf. http://www.optilite.dk/ovenlyskupler/pc-ovenlys.html (hvælvet opal polycarbonat)?


Best regards

Per Haugaard
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