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Lars Rohwedder <rok### [at] gmx de> wrote:
> According to the documentation of isosurface, all points with function
> value < threshold are "inside" the isosurface object.
Wellll...... it's an isoSURFACE, so there really is no inside, unless (IIRC) for
csg you use all_intesections
> The "mandel" pattern is "low" (near zero) far away from the Mandelbrot
> set, increases slowly near the border of the set and is 1 inside the
> "apple shape" set itself (with default values for "interior" and "exterior".
Can you cite that with a link, or is that your working hypothesis?
> So I had expected that a formula like 0.9 - mandel would give the
> What went wrong here?
Part of what's going wrong is that mandel is a POV-Ray pattern that has a built
in color map. And that wreaks hell with everything right from the beginning.
I'd say try using:
#declare Mandel = function { pigment {mandel 1000 exterior 1, 1 color_map {[0
rgb 0] [1 rgb 1]}}}
But you're having more success than I am.
Maybe you post your full scene as an attachment, and someone can figure this
out. All I'm getting right now is a hard-to-visualize infinitely thin layer.
You can try z-mandel.red or mandel (x, y, 0), or any of the other usual tricks.
- BW
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