CC node changes previous background?

Hi,

I have this curious problem, which I believe can only be due to some logic hiccup of mine: When I add a color corrector before a merge node to correct the signal that goes into the foreground (green), the CC also changes the background of the merge node (going in yellow). Why is that? How do I have only the incoming (green) signal affected, not the whole signal path?

See problem in screenshots (cc engaged, and not engaged): the pink dot (right) is not affected, whereas both the light blue background, and the green dot on the left turn black with cranked up contrast.

What is it that I am not understanding? Shouldn't the CC only affect the BW picture, not the blue background or the dot on the left?

Thanks so much,

Robert

CC node off

Screen Shot 2019-12-02 at 5.32.31 PM.png (414.42 KiB) Viewed 1792 times

CC node on

Screen Shot 2019-12-02 at 5.32.50 PM.png (407.91 KiB) Viewed 1792 times

On the third tab of the CC node, make sure the Pre-Divide/Post-Multiply box is checked.

Amazing! Thanks Eric for putting the time in. I really appreciate it. Works like a charm!

Amazing! Thanks Eric for putting the time in. I really appreciate it. Works like a charm!

You're welcome, it was no problem.