I haven’t found anything in the forum so far about creating custom EP and Radiance materials that simulate transluscent light-diffusing insulated panels such as Kalwall or Okalux . Has anyone done this, or know of the reliability of the results while specifying these types of materials? I am interest…

The trans material might be enough. If you want to get fancy, the Complex Glazing Data Base shipped with Window 7.6 might be worth looking into (you will get BSDFs for running Lighting and Energy simulations). I remember seeing a BSDF definition for some Okalux material either here or on the Radian…

@sarith By the way, could you tell me how to using BSDF file for energyplus material definition?

@minggangyin Window exports BSDF to IDF format and the XML representation itself contains Klems data for spectrums other than visible. This has been talked about quite a bit, but I am yet to see any examples. @mostapha or @devang , any usecases that you guys are aware of ?

So, I always run into this problem where I can never find all the info I need to fill out the component. Is there a database or something that can help me find more info on translucent materials than the manufacturer offers? For example, Kalwall only gives me the VLT, which I assume is the diffuseT…

You are right about that information not being enough. For defining trans you’d need diffuse and specular components (openness factor). You might able to get more details from the manufacturers themselves. We had an undergrad student who worked with Kalwall material and was using an empirical defin…

In that post, there is a file path to c:\DIVA\Thermal\Rhino\04_material_construction.idf. What is the comparable file path for Lb/Hb that material definitions can get pasted into? EDIT: A search of my C Drive for “.idf” pulled up userCustomEPLibrary.idf which is in C:\ladybug. I’ve run into this pr…

[image] JimMarsh: A search of my C Drive for “.idf” pulled up userCustomEPLibrary.idf which is in C:\ladybug. I’ve run into this problem before, but when I open that .idf with Wordpad it only says “!Honeybee custom EnergyPlus library” and I never was able to figure out where EP Materials come fr…

I found this other post you had that suggests to write custom materials into userCustomEPlibrary.idf. I still suggest you to add your material to userCustomEPLibrary.idf and not OpenStudioMasterTemplate.idf, as Honeybee overwrites OpenStudioMasterTemplate.idf once there is an updated version. Is…

[image] JimMarsh: Is it as simple as pasting the bolded part of this post shared above into that file? Yes. I suggest to add a new line at the end of every ,.

Awesome, Kalwall is now importing in gh! What is the respective file for adding custom Radiance materials? I successfully made a test material months ago through the addToLibrary Radiance component, but I have never been able to find that text file it lives in.