Materials properties in desktop Radiance

Dear all,

I'm just starting to use desktop radiance. I have modeled a 3d building in Autocad and now I would like to add some new materials to the Library. My question is how can I input the transmission factor of materials? Because I think the material editor window only has the option of changing average reflectance, specularity and roughness.

I will appreciate any help since the selection of different materials' properties is the main part of my work.

Best wishes,

Julia Mundo.

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