Christoph Hormann <chr### [at] gmxde> wrote:

> just for the record: a zero height box is perfectly legal (if it was not 
> it would be no problem for POV-ray to issue a parse error).

But that doesn't mean that there isn't a problem with them in POV.
For example on infinitely thin boxes you get the interior_texture 
on the "outside".

Lutz-Peter

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