https://bugs.kde.org/show_bug.cgi?id=424525

            Bug ID: 424525
           Summary: Wrong behavior of blending modes in CMYK
           Product: krita
           Version: unspecified
          Platform: Microsoft Windows
                OS: Microsoft Windows
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Layer Stack
          Assignee: krita-bugs-n...@kde.org
          Reporter: nikola.knezevic....@gmail.com
  Target Milestone: ---

Created attachment 130308
  --> https://bugs.kde.org/attachment.cgi?id=130308&action=edit
Multiply and screen blending modes

SUMMARY
Multiply and Screen blending modes in CMYK document are calculated wrong. They
appear to have been swapped.

Additional thoughts
1. It could be that the cause of this error is the inverse color calculation
for the CMYK color space. I have not examined the behavior of other blending
modes.
2. If document is saved in psd format and opened in Photoshop everything looks
fine.

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