Example of a rendered plasma.
You can find this filter in image menu following
-> -> ->
Plasma generates colorful clouds, which can be used for
textures. You control the turbulence in the plasma cloud with
the Turbulence slide.
All of the colors produced by Plasma are completely saturated.
Sometimes the strong colors may be distracting, and a more
interesting surface will appear when you desaturate the image
An enhanced version of the Plasma plug-in, called
Plasma2, with many more options and
parameters, is available from the GIMP Plugin