You guys may want to check out Inigo Quilez's page, and look at the "Fractals &
complex dynamics" section.
https://iquilezles.org/articles/
Articles:
Continuous iteration count
The M1 bulb of the Mandelbrot set
The M2 bulb in the Mandelbrot set
Area of M1 in the Mandelbrot set
The symmetry of the Mandelbrot set
Introduction to the Mandelbrot set
They might offer some insights into how to speed up your renders.
- BW
