What is the image precision used (menu Image > Precision) ?
How do you export the image ? PNG ? Please, give the export options you use.
How do you "test" the exported image (re-import it in Gimp, with another software) ?
How do you export the image ? PNG ? Please, give the export options you use.
How do you "test" the exported image (re-import it in Gimp, with another software) ?