Flow Field is up to 40,000 glowing particles drifting across a dark canvas, with speed and noise scale to adjust and a clip export that loops cleanly.
Each particle reads the direction of an invisible field and steers along it. The field comes from 4D simplex noise, a smooth random function, so neighbouring particles move together and form currents. Two of the four noise dimensions trace a circle over eight seconds, which means the last frame lines up with the first.
The loop length is fixed at eight seconds, so record a clip of that length for a clean loop.