Is it possible to use translucent materials in DIVA for grasshopper?

The discussion title pretty much sums up my question.

In my materials.rad file I see a material with the name GenericTranslucentPanel_20PercentTransmittance which I'd like to use, but I can't select it with the grasshopper material object. 

Does anyone know if i'st possible to switch something around so I can select this material (or any other translucent materials)?

Thanks!

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You can definitely use *trans* translucent materials in your daylight studies, and even create your own; more about that in this thread: http://diva4rhino.com/forum/topics/material

Hi, I've the same problem. I'm trying to use a translucent material (KalwallTranslucent15nano) and I have already verified to having in C:\Radiance\lib these files: rang.cal & KalwallTranslucent15nano.dat

Why is still impossible select this material from the grasshopper coponent? I can't even use the material named "GenericTranslucentPanel_20PercentTransmittance"

Thanks!

Simone

Hi Simone,

Indeed DIVA-Grasshopper does not support the 'transdata' material type in Radiance that the GenericTranslucentPanel_20PercentTransmittance material uses. If you're interested in a 20% entirely diffusing material, I recommend to add this trans definition to your c:\DIVA\Daylight\material.rad file.

void trans 20percent_diffuse

0

0

7 0.5 0.5 0.5 0 0 0.4 0

This material is entirely lambertian diffuse and allows 20% of incident light to pass through. If you want to learn how it was derived, see Axel Jacobs' Radiance Cookbook, p.21-3.

Best,

Alstan

Thank you Alstan, it runs!

Best,

Simone

Is there some kind of  workaround?  since i have a project that requires a transdata material type.

I have thought about exporting the model from grasshopper to radiance for the rendering but could until now not find a good way of doing it.

Best,

Niko

Hi Niko,

If the translucent material is fixed and unmoving (not parametrically controlled), you can simulate it using the DIVA toolbar and then use the 'include rhino scene' checkbox in DIVA-Grasshopper. Other than that however, there is unfortunately no good solution at this time as far as I am aware.

Best,

Alstan

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