[Radiance-general] Specifying surface properties from BTDF data

[FrankBob Holly]

I'm pretty new to Radiance, so please bear with me ;)

I have a commercial forward ray tracing program that I use to model complex 
window glazings. I can output the transmitted flux vs outgoing direction for 
light incident at different angles.

How would I create a surface in Radiance which would behave in the same way 
as observed using the forward ray tracer. BRTDfunc? Can I specify arbitrary 
output distributions for a comprehensive sampling of all incoming 
directions? Is there a "BRTDdata" surface type?

Any ideas? Other things I should be aware of?

Thanks

Frank

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