Christopher James Huff <cja### [at] earthlink net> wrote:
> Actually, it would be more comparable. The isosurface isn't composed of
> flat surfaces.
It is composed of _nearly_ (they are flat if the 4 adjactant vertices
are coplanar) flat surfaces when bilinear interpolation is used.
Smoother then unsmoothed height_field, but much less smooth than a
smoothed one.
With "interpolate 4" (normalized distance) they aren't flat anymore, but the
surface isn't continuous. For a really smooth surface something like bicubic
interpolation would be needed.
Lutz-Peter
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