This applet displays a reaction-diffusion system.
Begin exploring by using the "Preset" choice at the bottom - and the "Restart" button below it - to see some of the possible configurations.
Configurable parameters include a number of manual colour-map controls (on the left) - and six main parameters of the reaction-diffusion system (on the right).
Take care if using the other controls on the right. They are usually very sensitive.
The model is a cellular automaton, based on the [von-Neumann neighbourhood].
It is based on the Gray-Scott model, and was taken from John E. Pearson's Complex Patterns in a Simple System - Science, 261, 189, 9 July 1993.
More details about the type of system used can be found at the [Xmorphia web site].
Toroidial boundary constraints are appled, so the images will tesselate seamlessly.
Optionally, a bumpmap technique is employed to give the images a sense of depth.
The "saturated" state in the automaton can often be a chequer-board pattern. This is largely an artefact of the use of the use of the von-Neumann neighbourhood. I have also constructed a version that uses the [honeycomb neighbourhood] - and there the chequer-board artefacts vanish.