Spherize should have a way to not include the original image
Currently Spherize filter has no way to not have the original layer in the back of the spherical result. Workaround is to use ellipse-select to only keep the said spherical result.
Would be nice to have a checkbox or something to give us choice.
Or even just no choice and only get the result without original is good to me. It is much easier and cleaner to just duplicate the original in its own layer if one wanted to keep it than remove it after with a selection!