Here's something tricky:

Imagine if you have a gradient between two colors (such as black and white) - a smooth, gradual change between the colors. This gradient might take any form, but the main thing is that the change between the colors is smooth, instead of aprupt.

Now, it is fairly easy to greate "height lines" along lines with an equal "intermediate color" between the two extremes thanks to the Posterize function. However, I am wondering if there's any way - a script or something else - that makes it possible to generate lines that curve from one extreme to the other?

This image of a visualization of a magnetic field might help understand what I am looking after:

http://en.wikipedia.org/wiki/Image:Magnet0873.png

Imagine, for example, the North pole of the magnet representing "black", the South pole representing "white", and the regions between and around them representing a gradual change from one color to another. This script would take this basic color gradient and then change it into something like this image.

Does any script like this exist?

- Jürgen Hubert

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