"Alain" <ele### [at] netscapenet> wrote in message 
news:47b60e4b$1@news.povray.org...
>
> Make the inside cylinder a bit longer than the outer one. If they are the 
> same length, you'll have coincident surfaces at each ends.
>
> -- 
> Alain
>

That's good general advice. In this case it's not going to make a difference 
as the ends of the cylinders won't be part of the results of the 
intersection anyway.

Regards,
Chris B.

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