Hello, is there a possibility or addon for converting selected mesh parts to portal lights/area lights?
Similary to E-Cycles portal creator?
Best effects are obtained when portals are same size as holes in meshes.
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I was looking for the same today, but sadly I couldn’t find it.
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So, yesterday I wasted some sort of time for founding nothing, today with one minute I found an addon 
Edit. Unfortunately, it quite buggy, it only works with isolated meshes (not connected). Also, it creates a square area light that is matched to mesh by changing size of the light, not by creating rectangular area light with exact lamp size.
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Yes, sadly there’s no way, for now, to use mesh as portals. I am also having problems with that but I hope that the developers think about that. There’s a request on right-click select for something similar, but using shaders to activate the portal function on meshes.
Here:
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