Simon Lemieux wrote:
> 
> I was wondering if it was possible to simply have an infinite
> cylinder?
> Without any tricks... this should normally be trivial for the
> renderer... but was this coded?

I think this ought to work.  It uses the Reorient() macro from my
Thoroughly Useful Macros file:

#macro InfiniteCylinder(PointA,PointB,Radius)
quadric { <1,0,1>,<0,0,0>,<0,0,0>,-Radius*Radius
  Reorient(y,vnormalize(PointB-PointA))
  translate PointA
}
#end

Hope this helps,
John
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ICQ: 46085459

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