Where to start
Now that you know a bit more about fractals, you are probably wondering how to produce these with Ultra Fractal. By default, Ultra Fractal opens with a standard Mandelbrot fractal, so the easiest way is to take this fractal and start zooming.
Click and drag inside the fractal window to open the selection box. Drag and resize it, and then double-click inside the selection box to zoom in.
Ultra Fractal has many more possibilities, but it is a good idea to start with simple zooming to get a feeling for what fractals are and how Ultra Fractal works. Also, be sure to work through the tutorials to learn more.