I deleted the alpha channel from a layer with a mask. The mask was still
evident, and still functioned. I then saved the image, and exited.
Reloading the image, I am told gimp cannot load a mask for a layer without an
alpha channel, and the mask is not visible.
Since it was a lot of work to generate this mask (removing the background from
photo), I would like to recover it. Any hints?
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