[Radiance-general] modeling an insulating glass with an integrated capillary slab

[Valeria De Giuli]

Thank you Andy, this is a quick and useful widget, however in this case I have only direct and diffuse visible transmission, therefore I can only assign the diffuse transmission. Am I right?
Thanks,
Valeria

Il giorno 27/apr/2012, alle ore 23:31, Andy McNeil ha scritto:

> Hi Valeria,
> Trans is a quick and easy way to model this type of glazing.  
> You can use this widget to generate a trans material definition by entering your transmission and reflection parameters: http://gaia.lbl.gov/people/andy/public/transwidget/
> 
> However trans does not account for Fresnel effects that reduce transmission of glass at non-normal incidence angles (http://en.wikipedia.org/wiki/File:Amptitude_Ratios_air_to_glass.JPG).  So treat trans results with some degree of caution.
> 
> If you want to include fresnell effects and diffusion, you might consider use a glass surface and a trans surface one in front of the other.  Or you could generate a BSDF and use the new BSDF material.
> 
> Hope this helps,
> Andy
> 
> 
> 
> 
> 
> On Apr 27, 2012, at 1:34 PM, Valeria De Giuli wrote:
> 
>> Dear all,
>> I have to model a two-pane glass make up with a selective 6mm outer pane with an integrated capillary slab (it is called kapilux), white tinted. The obtained effect is a uniform and diffuse light transmittance. The only technical data that I have are: 30% of direct visible transmittance  and 15% of diffuse visible transmittance. I think I should model it with "trans" material, but I don't know which parameters I have to use. Does anybody has an idea?
>> Thanks in advance. Best regards,
>> Valeria
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