However, CC3 is not an image editor, and re-export of a raster background may not have the best results. It's a fairly common practice, though, to import a scan or other image and use that as a template to recreate the image. Then the background is turned off or deleted prior to exporting the finished map. Or the CC3 output can be loaded up in Photoshop or the Gimp and recomposited with the background with finer control.