Chaos Corona Forum
Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: patrick.testa on 2018-11-06, 09:50:14
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Hello everyone,
I have an issue with scene lighting: I'm facing difficulties in having neutral greys in my renders. Of course it's normal in scenes with mixes of natural and artificial lighting but I Always see a shift wowards red that I have to correct in Photoshop or using various LUTs to minimize it.
I attach a screenshot of a studio setup that I use to create and apply materials to the models before I put them in the real scenes; it's lit only with 2800K light panels, everything has neutral colors and the white balance is set to 2800K but the render shows up shifted towards red.
Is it normal? Or am I missing something?
Thank you for any advice!
Best,
Patrick
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Derp, misread your post. Yah that's kinda strange, it looks like the green values are slightly below where they should be in a neutral environment. As a stopgap you could add a slight green curve until it is true neutral, then save the curve file and load it into the frame buffer so you don't have to always edit it in photoshop.
Well a 2800 kelvin light is a very warm light; a neutral white light is 6500 kelvin .
It makes sense that a warm light would produce warm hues in your scene and would need a 2800 k white balance to offset that into greys .
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Hi mferster,
I've tried a workaround adding an "inverse" very light green color tint to the camera. It neutralizes the hue in that scene but I've not tested it in more complex scenes yet. Also, I'm not sure if it would be a correct approach or if I would only mess things up...
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This "issue" was discussed several times on the forum. You can read more about it in the following topics.
https://forum.corona-renderer.com/index.php?topic=15026.0
https://forum.corona-renderer.com/index.php?topic=20622.0
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I think the curve option would be more accurate rather the tint option since the color offset isn't uniform when you are using curves. Try the attached curve file in your frame buffer and see how it works for you.
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Thanks mferster!
I tried loading your .conf file; but seems that that file doesn't include the curve correction; maybe it needs to be saved in a separate .acv file.
Anyway working on the curves looks like a better idea then mine!
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I derped again, hahah. Here is the curve file
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Great! Thanks...