https://bugs.kde.org/show_bug.cgi?id=375873

            Bug ID: 375873
           Summary: PNG Need Option to Preserve Colors on Full Alpha
           Product: krita
           Version: 3.1.1
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: File formats
          Assignee: krita-bugs-n...@kde.org
          Reporter: bronsonmath...@gmail.com
  Target Milestone: ---

PNG supports keeping the color channels bellow the alpha. But there is no way
from krita to enable this.

For example.
Create put an image into krita. Set an alpha channel/mask to full black. Export
the image as png.
Then open the image, and disable the alpha channel. The image comes out a
single black (by default) color. 
What I expect is that the image should still be there.

This is for use in game materials and shaders where you need access to all RGBA
channels for blending etc...


Example plugin for photoshop thats open source:
http://www.fnordware.com/superpng/

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