Total magnification is given for each image.
2 Maximum number of iterations is set to 80000-640000. This much is required to resolve all details, although the number of iterations is much lower at most pixels. The total calculation time was several hundred hours even though I used a 200 MHz Pentium most of time. The last image demanded more than 200 hours by itself. Notice the similarity between the shapes in the middle of picture and the buds on the cardioid to the right.