Marvins_dad's Gallery
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A look at the clerestory...
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What a nice place to get a mugshot!
I saw your other vray query. I recently did some stuff for a glass shade company and it brought up a somewhat related issue.
It was something I never considered before. But when you stack dielectrics of differing IOR values you should use relative IOR values. Not sure how Vray calculates IORs but I presume out of the box it is absolute IOR values.
But for pure physical correctness the light passing through a glass pane then a film would be a stacked dielectric. So the IOR value for the film would need to be corrected to give a truly accurate result.
Or you could just bodge it.
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I think I ended up bodging it. LOL - I finally got a response on the Enscape forum that helped me create what I needed within Enscape. I had Sun Shadows raytracing turned off. Didn't know that was a switch I could turn on and off. It kept me from having to learn Vray for another project at least!
I stacked a window glazing system with a transmittance of 51% with a plane that had 20% transmittance to see if there was a change. With sun raytracing on, it worked!
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Excellent work!
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