I dedicated a good time years ago to create artistic effects, some more suitable for photos, some better for text.
My intention is give to P2P a large (really large) menu of effects/filters. Many of them are the classical effects that all professional raster CG software has, but all my effects will be there too.
The figure above shows one of my effects that try to transform a photo in a image that looks like "drawed or painted by human hands". The thumbnail inside shows the original photo modified by the math model I created.