simulation of an internal roller blind

Dear Radiance-users,

I would like to simulate in RADIANCE an internal roller blind, which has
according to the supplier (unfortunately they do not know more) the
following properties:

as optical properties(reference to T65):
transmission: 2,5 %
reflection (to the outside): 71,8 %

could anybody give me please a hint which is the best way to implement this
I could accept a simplification, but what kind of material is the best
choice to do so (glass, trans)?
Has anybody experiences with this?

I would appreciate any help,

sincerely yours,



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