In article <3c72cb59$1@news.povray.org>,


> That is the point: it is flat. And since the nr. of triangles is huge I
> don't want (can't?) double them to make it closed.

Well, you are trying to simulate an effect over the interior of the 
object, on an object without an interior...maybe you should explain more 
clearly what you want to do. The double_illuminate flag will let the 
surface be lit from the other side, which might be enough for your 
purposes.

-- 
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/

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