I have not been able to reproduce the problem with the steps you've provided with GIMP. I have taken the first image, resized it to 50%, and added a magenta background layer, then collapsed the image onto the background, and the image has no artifacts. However, I noticed that I was able to reproduce your problem if I were to remove the alpha channel from the image then do a magenta flood-fill on the background.
Perhaps somewhere along the way the alpha channel is being lost somewhere along the way, perhaps being merged with a white background...
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#1fastcall22
Posted 27 September 2012 - 04:50 PM
I have not been able to reproduce the problem with the steps you've provided with GIMP. I have taken the first image, resized it to 50%, and added a magenta background layer, then collapsed the image onto the background, and the image has no artifacts. However, I noticed that I was able to reproduce your problem if I were to remove the alpha channel from the image then do a magenta flood-fill on the white image.
Perhaps somewhere along the way the alpha channel is being lost somewhere along the way, perhaps being merged with the white background...
Perhaps somewhere along the way the alpha channel is being lost somewhere along the way, perhaps being merged with the white background...