In an older version of Gimp, perhaps a year or so old, there was an option included under Script-Fu that could alter a picture to look something like this:
or like this:
Does anyone remember the name of that plugin? It was included with Gimp when you downloaded it and it isn't present in the latest version.
You could select a photo and it would do the effects above to it and if you hit Print Screen on your keyboard you could then save it.
If anyone remembers the name of it, I would be grateful if you could also tell me where I may be able to download it.