Hi fellow Mandelbrot enthusiasts,

this article on the Perturbation for the Mandelbrot set points to this pdf on the math for the pertubation.. It seems to work most of the time but sometimes produces glitches. There are examples of glitches here and that article also states

Pauldelbrot on fractalforums.com published an algorithm to find reliably which pixels of a render are correct and which aren't.

However, I was not able to find the page showing the math for the glitch detection. Furthermore, what exactly to do to fix the glitch is not clear either. Can someone point me to this information?

Thanks!

Linkback: https://fractalforums.org/noobs-corner/76/perturbation-glitch-detection-and-glitch-fixing/2973/