I have one layer with some black pixels in the middle and a transparent background.
If I add an opaque white background under it, merge both, and then click "Antialias" from the "Filters" menu, it correctly generates gray pixels where appropriate. However, I intend to use this image on top of a dynamic background, so I can't use anti-alias against a specific color, but if I don't add the background opaque layer and just use the Antialias filter, nothing happens. My expectation was that semi-transparent pixels would be generated, so that it would become anti-aliased with different backgrounds.
Is there a way to achieve this or am I trying to do something wrong?