app that uses a totally different file and document format
“Uses” is a little nebulous here. You can open/paste/embed most common types of image into Inkscape, and you can open/paste SVGs in GIMP. It actually is really fucking easy to do the drawing part in Inkscape and then pop the result back into GIMP.
Eh, I don’t think “open a whole separate app that uses a totally different file and document format” is “really easy”.
“Uses” is a little nebulous here. You can open/paste/embed most common types of image into Inkscape, and you can open/paste SVGs in GIMP. It actually is really fucking easy to do the drawing part in Inkscape and then pop the result back into GIMP.