There are plenty of background and filter options to choose from, so you might as well make good use of them! First things ...

You can remove the image background within GIMP and make it transparent. You can create drawings on each frame using several tools like paintbrush, text tool, bucket fill tool, smudge tool ...

It all comes down to how much overlapping detail there is between the foreground and background. We'll look at two ways to make the background transparent: an automatic approach which only takes a ...