What is it ? :
This coloring is an orbit trap using regular polygons as traps.
The Parameters :
Polygon Order : The number of side of the regular polygon.
Center/Rotation/Size : To move, rotate and magnify the trap.
Ratio Width/Heigh : To stretch or sqeeze the trap.
Width : This is the width of the frame in the "Frame" mode.
First Trapped Iteration : The points aren't trapped before this iteration. The result on the screen is that the biggest shapes are removed.
Power : To modify the way the interior of the trap is colored.
N.B. : The traps are of finite extent and the points that aren't bailed
out are set to solid color. This provide a mask feature. To get a "standard"
orbit trap without solid color, just increase the size of the polygons.