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Compositing Problems

New Here ,
Dec 10, 2022 Dec 10, 2022

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Hi,

I am desperatly trying to composit something here, but cannot get it to look realistic. I want to edit a somewhat blurred red flag into a dark blue sky, but in the areas of mixed alpha/partial transparency I get these dark borders which make it look absolutly unrealistic. Makes sense because red and blue mixed together result in some purple color which ends up being darker, but can I prevent that somehow?

Here you can see a picture that visualizes my problem.

Screenshot 2022-12-10 224526.jpg

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SDK , Windows

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correct answers 1 Correct answer

Community Expert , Dec 10, 2022 Dec 10, 2022

This is one of those instances where you might want to go into Color Settings and check "Blend RGB colors using gamma":

blend-gamma.png

 

Note that this will only work if you have them on separate layers so that they are actually blending. If you do it in a single layer it will all blend in the document color space, as it does when unchecked.

 

Unchecked is the default and you should normally keep it as such.

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Community Expert ,
Dec 10, 2022 Dec 10, 2022

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This is one of those instances where you might want to go into Color Settings and check "Blend RGB colors using gamma":

blend-gamma.png

 

Note that this will only work if you have them on separate layers so that they are actually blending. If you do it in a single layer it will all blend in the document color space, as it does when unchecked.

 

Unchecked is the default and you should normally keep it as such.

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New Here ,
Dec 10, 2022 Dec 10, 2022

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Omg thank you soo much this is what I spent hours searching for!!

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Community Expert ,
Dec 10, 2022 Dec 10, 2022

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You can also do it in Lab, and here even in a single layer. But for some reason I don't think it looks quite as good there, the transition looks a bit dirtier. I don't know why.

blend_Lab_2.png

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