> Hi,
> I try to achieve a non-photorealistic render like it can be done with Toon
> Shaders, the problem is the aliased result obtained with the function:
> PP_Find_Edges. I can't adjust the paramenters in order to improve the
> result.
> There is a way to get better results?
> 

I had the same problem when I tried PP_Find_Edges. I think the only real 
solution is to render a (much) larger image, and then to scale it down. 
But as find_edges is rather slow, I found this rather unpractical.

A recent thread on various methods one can use to get edges is there:
http://news.povray.org/povray.general/thread/%3C448ebdc1%40news.povray.org%3E/?mtop=9

For the kind of picture you're interested in, using a "edge find" filter 
of a graphical program (The Gimp, Corel Photopaint, etc...) could also 
be a very efficient method (see 
http://www.lightning-generator.org/newsgroup.php?id=84&group=povray.images&first=1&last=25#84

if you understand French)

Thibaut

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