Tornado Warning

[Pauldelbrot]

An Antimatter Mandelbrot distance-estimator image. The angle parameter produces triple seahorse valley/triple spiral valley features. Purple points go to infinity, red ones to zero, and white points belong to the boundary of the Mandelbrot-like set for one critical point. Black points belong to the interior, as seen in the minibrot at lower right. The set in question being the points for which the selected critical point does not go to zero or to infinity.

The highest iteration outside the M-set is 4994, but points near the border of the minibrot approached the set limit of (for this image) 1,000,000 before cycle detection kicked in.

Freely redistributable and usable subject to the Creative Commons Attribution license, version 3.0.

Detailed statistics:
Name: Tornado Warning
Date: March 4, 2009
Fractal: Antimatter Mandelbrot set
Location: c-plane, a = 0.66803398
Depth: Shallow
Min Iterations: 53
Max Iterations: 1,000,000
Layers: 3
Anti-aliasing: 3x3, threshold 0.1, depth 1
Preparation time: 5 minutes
Calculation time: 10 minutes (2GHz dual-core Athlon XP)