The Gray-Scott model illustrates a reaction-diffusion system that represents interactions between two substances in a medium. It combines chemical reactions with the diffusion of the substances in the medium.

In the model, two chemicals, called U and V, are used. U, as a "nutrient," is consumed by V. V spreads until U is used up in a certain area.

This system is described by two mathematical equations that represent the concentration changes of U and V. The Gray-Scott model can generate a variety of patterns from simple to complex.

The simple yet powerful nature of the model has made it an object of study in chemistry, biology, and physics. Its aesthetics have inspired STD.DEV to use it for innovative visuals.