https://bugs.kde.org/show_bug.cgi?id=394493
wolthera <griffinval...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|WAITINGFORINFO |INVALID
Status|NEEDSINFO |RESOLVED
--- Comment #4 from wolthera <griffinval...@gmail.com> ---
Okay, so what is going on here is that CMYK in Krita does it's blending modes
in CMYK, unlike photoshop, which does all blending modes in RGB regardless of
colorspace. Because going between rgb and cmyk requires a conversion, it can
mess up the image if you're not careful, and is at the least slower. So hence
we don't do it.
In RGB the lowest value is black and the higher value is white, and multiply
works as such that the values reduce, thus become darker. As for cmyk the
lowest value is white and the highest value black, so multiply still makes the
values lower, but they become brighter. Due this, it's recommended to do your
image in RGB and only convert it to CMYK for some final touch ups when done.
So this is not a bug, but a technical difference, hence I am closing it as
invalid.
https://docs.krita.org/Basic_Concepts#Colors
https://docs.krita.org/Color_Models#CMYK
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