I did some short (2 second - 30 frame) animations in Disney's Animation studio and in DPaint in order to better understand the programs. Then I ran them through filters in ImageFX. My goal was to see if I can take animations done in 320x240, scale them to 640x480 with antialiasing turned on, and then run a few filters to remove jaggies.
That way I could do animations in lo-res Amiga resolutions and convert them for better display on a television or Youtube, or burning to DVD.
It actually sort of works with animations because they are line drawings. Some of the filters thicken up the lines and make it look like it was drawn with felt-tip marker.