Mike Frazier wrote:
I remember when I first saw one of Paul Carlson's synthetic coloring methods and I was impressed with how it created a 3D visual effect. I picked the Astroid_Mset formula and spend a little time experimenting with the algorithm to try to figure out how it worked. Along the way, I stumbled upon some curious things. I also got to make a few nice images. There was way too much to fit in one post so I decided to break it up in bite sized parts.
Part 1 - A Minibrot Detector
I will start off with one of the curious things. This formula is a minibrot detector. I mean it draws a big astroid shape around every minibrot in the image. You can adjust the relative size of the astroid versus the size of the minibrot. The yellow shape in the image has four lobes and is the inside out astroid shape surrounding the largest minibrot in the center of the image. Notice that inside the yellow astroid is a magenta period doubled astroid with 8 lobes. As you look toward the center you can see a 16 and 32 lobe astroid before they get too small to see. All the other astroids in the image surround other minibrots that are too small to see. Here is a link to a webpage with an image and a parameter file:
That looks pretty neat. It ran fine in XFractint. -- David gnome@hawaii.rr.com authenticity, honesty, community