A change here. A different world.
Fields of possibility.
A field of simple reactions, with no plan for the whole.
Change a local condition. Watch the structure respond.
An evolving field.
A connected field. Seed a bridge, or cut a passage and watch the boundary reorganise.
Drawing is optional. On touch, enable it to use the field; finish drawing to scroll again. Keyboard: arrows to move, Space to apply, Escape to finish.
What is happening here
The pattern belongs
to the conditions.
Two concentrations react and diffuse across a grid. One material is replenished; the other consumes it. Each location responds only to its neighbours. The larger form emerges from those exchanges.
Membrane, Division and Flow use different rates and starting structures. Flow also favours diffusion along one axis and adds slow transport. The light and contour lines come from the computed concentrations.
This is a mathematical study using the Gray–Scott model, computed locally in your browser. Reset returns to the same starting conditions, so you can compare the consequences of different interventions.
Karl Sims · Reaction–diffusion tutorial ↗