In article <3dff75af@news.povray.org>,
 "Gilles Tran" <tra### [at] inapginrafr> wrote:

> Note that there are cases where I was never able to get rid of this problem,
> in spite of putting "hollow" keywords everywhere, making sure that
> everything was really transparent etc. I ended up rendering the leaves
> separately and using a mask to put them on the final image !

Probably because the transparent surface was causing POV to sample two 
shorter intervals instead of one long one. Raising the number of samples 
might have reduced or eliminated the artifact, at the cost of slower 
rendering.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/

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