This is a screenshot of the fractal plasma controller. It will draw into a separate popup window.

The Random dots slider controls how frequently random points are put in instead of blending. These then show up as star bursts.
A baseline image Image with higher random factor

The Blend slider controls how colors blend together. When a new point is colored it is typically the point 1/2 inbetween two other points, and its value starts out of being the average of the other two points colors. If this control is set to zero then the points stay the average and the diagram is not as interesting. The higher this value is set to, the more the blended points color varies from the average.
Zero blend A baseline image Image with higher blend factor