What is it ? :
These formulas are inspired by the Martin formula by Mark Townsend.
The Parameters :
These formula need four real parameters. These parameters are the real and imaginary parts of "a" and "b". The bigger a and b are, the more complex the shapes displayed are. If you enable the the "|a| = |b| = c ?" feature, the modulus of a and b (their "size") will be equal to c. So you can enable this feature, modify c until the shapes are complex enough, and then modify a and b to get other patterns of the same complexity. Usually, increasing the Maximum Iterations will also increase the pattern complexity.
The "Mode" parameter describe an additionnal term added each iterations. x and y are the current real and imaginary parts of z and x1 and y1 are the real and imaginary parts of the first value of z (the pixel).
The real func 1 is applied to x1 and the imaginary func 1 is applied