"JimT" <nomail@nomail> wrote:
> I did enjoy it. So much so that I took the liberty of tweaking your function to
> give first derivative continuity at the join.
>
> [snip]
>
> I'm not too familiar with user-defined isosurfaces but will need to become so to
> do some of the things I am planning, so thanks for the tutorial.

You seem to be well on your way.  In my experience, the trickiest part was
figuring out the max_gradient, but once you understand conceptually what's going
on, that becomes fairly easy to deal with.

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