Gradients and Partial Iterations
After a few submission to the voting boot I realized how ugly my color maps were. I decided to tweak them a bit but they were still ugly so I looked for an alternative. Gimp gradients were my first stop and I'm really pleased by the result. The file format is undocumented but really simple. The gradient editor in the Gimp really lacks a undo but except from that it was just what I needed. The gradients shipped with the Gimp are not really adapted for fractals but I made a few of my own with interesting results.
With multiple gradients inside a single color map, the color step from one iteration to the other is more apparent. I found an interesting article talking about using the modulus from the last iteration to compute partial iterations. The result is impressive. One draw back is that it requires a bit more precision to compute the partial iteration so we lost a digit of freedom on the zoom and a few interesting submissions from the voting boot.
