In article <Xns### [at] 204213191226>,
 Alain <noe### [at] onca> wrote:

> Thanks but I just tried an intersection between text and a box or plane and 
> the normals remain the same.  Unless I'm not understanding correctly.  Why 
> two planes?

Actually, I don't think what I was thinking of is expressible in POV, so 
just ignore that.
If the text object is untransformed, you could just check the z 
component of the returned points and use that to decide whether to flip 
the normal. You could do it even if the text is transformed, though it 
would be a little more complex.

-- 
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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