Autopilot navigate to blank area

[evan0greenup]

Describe the bug
When enable autopilot, after zooming a while, the autopilot will navigate the camera to blank (dark) region. After the whole screen become blank, the camera will be reset.

To Reproduce
Steps to reproduce the behavior:

1. Choose "Mandelbrot" Fractal.
2. Enable Autopilot
3. Wait until the issue occurs.
4. The whole screen be occupied with dark area. After a while, the camera reset.

Expected behavior
The camera will always tend to the area which has richest features and details of Fractal. Large chunk of uniform area should be avoid.