I’d like to output the original image and the processed (filtered) image as layers in a gimp XCF file. In gimp I can then adjust the “strength” of the filter by playing with the opacity of the filtered layer.
At the moment, if I send output to an XCF file when there’s more than one image in the list, then G’MIC writes multiple numbered files. Is there a way to write multiple layers in one file instead?