Mark Harris wrote:
> 
> I'm using POV-Ray 3.1g.  The documentation includes an example of a surface
> of revolution (see "Surface of Revolution Object" under the help index) for
> creating a goblet.  The image shown in the help file shows both front and
> back sides of the object reflecting, but when I run the same code I get
> reflection from the front only.
> Is there some magic configuration option for enabling reflection from both
> sides of a surface?  What am I missing?

the "open" keyword, if I understand correctly your question.
As provided in the help file, the sor is ended with an horizontal
disc at both end.

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