area light visible to camera behind glass

Foundry Modo (Developed by stenson, Integrated Plugin developed by Paul Kinnane)

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jwfvr
Licensed Customer
Posts: 97
Joined: Tue Nov 17, 2020 11:17 pm

hi - sorry if the answer is obvious - I have looked and cannot find how to hide area lights from the camera when they are behind glass materials - is it possible?
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arealight.png
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funk
Licensed Customer
Posts: 1206
Joined: Mon Feb 07, 2011 1:24 pm
Location: Australia

I don't do this often, but it seems the quickest way is to disable area light > "visible on specular", and set general visibility = 0.0
This will prevent specular from that light appearing on other surfaces though, as you can see in the glossy sphere below.
hide_light_behind_glass_01.jpg
The other option is to set the area light > light pass ID = 2 and general visibility = 0.0. Then put all your glass in a new mesh, and disable that mesh's octane vtab > light pass mask > light pass ID 2
hide_light_behind_glass_02.jpg
I have attached a zip with both examples
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hide_light_behind_glass.7z
(28.61 KiB) Downloaded 114 times
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jwfvr
Licensed Customer
Posts: 97
Joined: Tue Nov 17, 2020 11:17 pm

got it - thank you! second option seems best.
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