I have a color image detailing a humanoid skin texture. On this texture I have transparent sections where clothing would be. The edges of these transparent cutouts are smoothed/feathered into the colored area around it (the alpha feathers into the colored area gradually moving from 0% to 100% opaque).
I am trying to eliminate the color, turning it white while keeping all the transparency detail in the image intact. This way I can export and use the result as a mask in a separate application.
What would be the best way to go about this? My thoughts were to somehow copy all the alpha channel information from my layer and paste it into a completely opaque white layer? Can't seem to figure out how to do that without obliterating the smoothed/feathered alpha detail.