Thousands of mindless agents grow a living, branching network.
Each agent reads three sensors ahead — left, center, right — sampling a trail map. It steers toward the strongest scent, steps forward, and deposits trail where it lands. Every frame the trail blurs and fades. No agent sees the whole picture, yet they sculpt an efficient transport network together.
Real Physarum polycephalum solves mazes and reproduces transit-map topologies with no brain. This is stigmergy: computation stored in the environment, not the individual. It is a vivid case study in decentralized search, self-organization, and emergent optimization.