Excample of the effect of the SNN graphics filter. This is a detail from the drawing <a href="//commons.wikimedia.org/wiki/File:Blake-Abel.jpg" title="File:Blake-Abel.jpg">Image:Blake-Abel.jpg</a> (PD) by <a href="//commons.wikimedia.org/wiki/William_Blake" title="William Blake">William Blake</a>, showing the head of Kain, before and after applying the SNN filter.
<a href="//commons.wikimedia.org/wiki/William_Blake" title="William Blake">William Blake</a>, <a href="//commons.wikimedia.org/wiki/User:Duesentrieb" title="User:Duesentrieb">User:Duesentrieb</a>
CC BY-SA 3.0
<a href="//commons.wikimedia.org/wiki/File:Blake-Abel.jpg" title="File:Blake-Abel.jpg">The Murder of Abel</a> (PD) by <a href="//commons.wikimedia.org/wiki/William_Blake" title="William Blake">William Blake</a>