Have you tried using 'inverse' with a 'difference' of the canoe mesh
and plane?
Meshes (bicubic, triangles, etc.) don't CSG well, if at all.
Other messy option would be to reproduce the basic canoe shape using
somethings else, like a set of blob components, and difference that
from the plane.

Bob

Ed Ambrose <eam### [at] tricordcom> wrote in message
news:37e7c9c5@news.povray.org...
> I'm trying to design a canoe using Povray so my model contains a
plane (i.e.
> the water) and a bunch of bicubic patches.  However, if I set the
plane at
> the correct waterline the inside of the canoe fills with water (i.e.
the
> plane is visable inside the bicubic patchs that form the canoe).
Any
> thoughts on how I could fix this?
>
> Thanks
>
> Ed A.
>
>

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