Wikipedia talk:Articles for deletion/Sterling Fractal
Focus of fractal generators
The image above and to the right is a plot of the standard Mandelbrot set, however, there are filters in place that add interest to the image. The dark green and pink regions in the upper right are areas that are not part of the set, and traditionally is where much of the colour banding occurs. Notice there is no colour banding, rather, sweeps of colour.
The light blue and green region on the left and lower left of the image are areas that are part of the set, and traditionally the colour there is a single, flat monochrome. However, the colour filters have added banding and sweeps in that range, adding interest to what would otherwise be a very boring segment of the image.
In traditional generated images of fractals, the majority of the interest lies only on the boundary between the points that are in a fractal set and the points that are not in the fractal set (with additional interest in how far from being in the set certain points are).
The image to the right is better for understanding what pixels lie within or without the Mandelbrot set due to the less-interesting colouring. The area that's within the set is the completely black region in the lower left, and the completely black "dots" within the red areas. What is not in the set are the coloured reddish regions that fade to black toward the upper right.