"Gilles Tran" <tra### [at] inapginrafr> wrote in message
news:3A644E20.AE2D2EF6@inapg.inra.fr...
>
> In fact the simplest isosurface would be y (or x, or z) threshold 0...
> The plane isosurface is one of the most useful too, since it's the basic
> substrate for adding other functions (noise, ridge multifractals etc.).
>

Very true - I should have said "... simplest isosurface using 3
dimensions" - and even that's a matter of opinion. After all (x,y,z) is even
simpler, but a bit boring.

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