Chaos Corona Forum
Chaos Corona for 3ds Max => [Max] Feature Requests => Topic started by: CharlyRT on 2023-06-08, 22:18:03
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Hi there, sometimes i want to generate caustics just for artistic purposes, but in order to use caustics "visible to refractions" has to be turned on, with that, the light that i want to generate caustics is visbile in the objects reflections, causing undesirable ressults.
In the attached image i compare the ressults from Corona 10 RC2 and Vray 6, is there any possibility to make the light invisible for this porpuse?
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Hi,
There are separate switches both for visible in reflections/refractions and for caustics. One should not intervene with another.
In your case having Generate caustics enabled and Visible in Reflections disabled should be the option to pick, if I understand the attached image scene setup correctly.
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Hello Aram
Thats how i have setup my scene, the light is visible in caustics, but caustics doesnt appear unless i turn on "visible in refraction", but even with "visible in reflections" turned off, the light still appear in all reflections.
Heres a video of the scene, maibe im doing something wrong.
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It's possible this is the reflection of the light appearing on inside/back surfaces seen through refraction - these will likely count as refraction (since that's what they are seen through).
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Hi Tom
Is it possible to avoid it???
In the vray example, it can be, soooo, I know that these are different render engines, and Corona "tries to make everything more accurate", but like i said, there are some cases where we want some artistic fredom
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Nothing direct comes to mind - there might be some way of doing it in post, using masks to isolate and edit the lights (and their reflections), or perhaps in LightMix (though the caustics for the light would be in the same lightselect - however, looks like the caustics and the reflections would be in different places so you could just erase the reflection in the lightselect layer, and recomposite the layers). Just thinking aloud here, never tried anything like that to know if it would work :)