Photica is a complex beast: strands of autonomous agents are produced, each with a specific starting point and destination in mind. They oscillate between these two values over time, offset by a small amount controlled by a constant. This produces waves of interference and motion, enhanced by a carefully-selected palette, generated according to a chosen range. There is a small chance of a tight-ranged, near-monochrome palette, and a similarly small chance of a wide-ranging, vivid palette. Most colour ranges will fall within a happy mid-point.