There are many limitations in Mathcad's graphics capabilities (and a corresponding list of feature requests to improve them). Most of the time I just work around these limitations using standard techniques or just sigh and move on ("nothing to see,move along folks..."). However, every once in a while I get sufficiently irritated to do something about it.
In this case, I wanted to have color the mandelbrot set and didn't much like the display in 3D, so I wrote a function to use the 3D colormaps to colour a 2D image matrix for display in the Picture component. The worksheet also contains an animation.
However, I also have a memory like a something or other, I forget what. Checking after I'd written the attached worksheet, it turns out that this problem has arisen before and dpsycho posted an example that replicates the Rainbow map and I also found some other of my worksheets that created custom colormaps.
Stuart
Slightly modified version ...
It's interesting to note how much difference choice of colormap makes in bringing out the structure of images; any give colormap can be very good for one image and useless for another.
