"Warp" <war### [at] tagpovrayorg> wrote in message 
news:488a1829@news.povray.org...
> B. Gimeno wrote:
>> ....also known as Klein's Surface, this is a test of the almost finished 
>> new
>> version of the bastard tiling shapes from hell include file.
>
>  Personally I have always had a problem accepting klein's bottle as a
> true *borderless* surface because the surface intersects with itself,
> and the intersection could be interpreted as a border.

 Can't it be raised up though? So nothing intersects? Like a coil, I guess?

   ~Steve~

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