I designed the graphic you see below to have a squared box-bevel frame, and don’t like it. I’m including it in my example only for a general placeholder: the four levels of luminousity will be removed (since the GIMP engine will generate the frame); and expect CYAN to become the alpha channel for the PNG it will become.
I’d like to experiment with ROUNDED frames, but really I’m totally open to your professional design suggestions, and any GIMP plugins you’ve used and like! Thanks friends.
-s