Warp <war### [at] tagpovrayorg> wrote:
>
>   I really don't understand what is it that you are trying to do.
>
>   Are you trying to, perhaps, project the isobars of an isosurface onto
> a plane (so that it will look like an elevation map)?


Apologies.

Let's start with a contour plot like Mike showed.  A plane with isobaric data
(like a weather map of temperatures across a region).  My goal is to make a
corresponding isosurface that matches this isobaric data -- that is, the
contour lines match up with the isosurface's elevation.  Looking at the
isosurface from the 'top', I would expect to see a contour map that looks
identical to the planar map.

Using your trick, Warp, I can generate a contour map on my isosurface via a
gradient function.  Using a noise3D function like Mike, I can generate contour
lines on either the isosurface or the plane... I just can't seem to get the
syntax right to make them match.

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