Greetings, everyone! This is my first post on the forum. Apologies if this should be in the "Noob Corner" and I did search around a bit before asking. I have been dabbling in fractals for a few decades, on and off.
A big "thank you!" to all long-time members whose work and art I've looked at over the years.
I've started exploring 3D fractals in Mandelbulber again. I love the formula once known as "Hybrid19," which the amazing Buddhi / Mr. Marczak debuted here
http://www.fractalforums.com/mandelbulber/mandelbulber-settings-gallery/. I have attached it for reference. The header says it is from Mandelbulber 1.06!
While I can get it to work just fine in Mandelbulber 1.21, I struggle to figure out whether it can be used in the current Mandelbulber. Is there a way to convert or import these old formulas? I would love to take advantage of the OpenCL rendering that 2.21+ provides. It
seems like the current version can compile OpenCL code for anything now.
As best I can tell Hybrid19 is a hybrid of a Mandelbox and Menger Sponge. I've tried, by careful comparison, to try to replicate it in Mandelbulber 2.21 by using 1) the Mandelbox - Menger type in the drop-down menu, as a single fractal, and 2) making a hybrid "by hand" of the two in Mandelbulber 2.21. The second way gets me shapes which are vaguely reminiscent of Hybrid19, but not really in the ballpark. One aspect of the original specification that perplexes me is the "hybrid power" parameter of -1.1:
hybrid_formula_1 8;
hybrid_formula_2 7;
hybrid_iterations_1 2;
hybrid_iterations_2 2;
hybrid_power_1 -1.1000000000000001;
hybrid_power_2 1;
hybrid_cyclic 1;
mandelbox_folding_min_radius 0.29999999999999999;
I have no idea where to put that, or frankly, what I'm doing with several of the parameters.
I would greatly appreciate any help you can provide. I'm sure others have shared the feeling of being a bit obsessed with the beauty of a certain formula, and this old one particularly appeals to me. If it matters, I'm using Windows 7 64-bit, but I could switch to a Debian 9 machine (less CPU power, comparable GPU).
Cordially,
Prof Jski
Linkback: https://fractalforums.org/mandelbulber/14/using-an-old-mandelbulber-formula-in-latest-mandelbulber/3437/