This page contains several types of escape-time fractals. The names are those used by fractint.
Color-cycling gives a "bubbling-effect"
Color-cycling gives a "volcano-effect"
Note: this image is highly falsened by the drawing-choice 'boundary tracing'!
The shining effect is due to fractint option 'decomp=256'.
The last image is not a fractal, but the result of a bogus calculation in fractint; you get a mathematically correct image when activating 'floating point', but it is less nice - artistically.
These two images have no special structure, but they become spectacular when fractint's color-cycling is activated: the different rings start to turn in different speeds and directions (rotation effect in a wheel)!
Your comments are welcome! Mail to Patrick Hahn (firstname.lastname@example.org)