I am lighting up an outdoor sign with a faded wall with emissive appearance. When viewing through glass the object becomes "un-faded". Any suggestions? I will probably end up using built in light system but wondering if I did something wrong.
Faded/Unfaded, only applies to the main camera rays. Which means It's still visible to reflection and refraction rays (and shadow rays).
In this case, looking through the glass (refraction rays) it's still visible.
It's a big "BAH" and we need to get a solution from NVIDIA.
Looking at the image, I'm curious why giving the sign itself a bit of emissivity wouldn't be an option..? Maybe that makes it a bit too "flat" looking..???
Of course, the other option is to get on 2018 Then you can replace your emissive planes with rectangular area lights.
This is using a spot light. But still wondering why faded object became un-faded through glass.
try using a total black map in the alpha channel of the emissive material of your plane. Adjust the brightness accordingly
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