heads up if you ever use gimp for redacting screenshots and the like
with the default settings, "clear", or the delete key, only makes a region transparent but doesn't delete the colour info. it can easily be retrieved
ways to fix this are:
1. uncheck "save colour values from transparent pixels" when exporting
2. put a fresh transparent layer underneath everything, its colour info (pure black) will be saved instead
3. just fill the area with a solid colour instead
3.1. or save as jpeg
@codl This actually bit me in the butt during game development ages ago, when I used the alpha channel in a sprite sheet, but I was also accidentally using a specific color as transparency, and with both kicked in at once, all the areas I'd deleted were visible because they weren't the right color.
