Klaasvakie <kla### [at] gmailcom> wrote:
> lathe {

  I don't know if this has anything to do with the problem, but you could
use a mathematical paraboloid created with an isosurface or a poly (the
latter might even be more accurate, albeit more difficult to write) instead
of using a lathe which only approximates the shape.

  If you don't know how to create an isosurface or a poly, see these
tutorials:

http://povray.org/documentation/view/3.6.1/73/
http://povray.org/documentation/view/3.6.1/74/

-- 
                                                          - Warp

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