https://bugs.kde.org/show_bug.cgi?id=413125
--- Comment #4 from vanyossi <ghe...@gmail.com> --- Created attachment 123448 --> https://bugs.kde.org/attachment.cgi?id=123448&action=edit Alpha to color effect Logic tells me you are right, it should only affect the alpha channel, but In reality as we make a color more transprent it looses saturation to the white below. I don't know how is implemented in gimp 2.10 but it gives me the same results. Attached image is from gimp Color to alpha. the first two panels I applied Color to alpha, then converted the alpha from the channel directly into a transparency mask: The first one has the mask turned off, the second one has mask on (in the first on e you see black on fully transparent colors) There is loss in color. The third and last panel: after applying color to alpha I made a selection from that alpha information and applied it as an transparency mask to the original image. The third is with the transparency mask on, and the last one with the transparency mask off (Here we only affect the alpha but we also see loss of color). Doing the exact same in Krita will yield the same results. Color to Alpha -> Split Alpha -> Alpha into Mask. For the second: Color to Alpha -> Ctrl + Click on layer thumbnail (or Select -> Select Opaque) -> right click on layer: Add Transparency Mask. However in Krita the preview does seem to shift color. This seems to happen as the Threshold is less agressive and affects much more softly other colors which in turn gives the apperance of a shift in color (less saturated). In Gimp this effect can also be seen but to a lesser extent since the threshold is much more contrasted, in fact its in Krita it is not possible to adjust the threshold to affect the colors in the same way as the gimp. -- You are receiving this mail because: You are watching all bug changes.
