t = 0
Drag the donut to turn it. For parallel viewing, keep the two donut centers no farther apart than your eyes (about 6 cm); a card held between your eyes helps each eye find its own image. Cells above the cutoff (a fraction of the firing threshold) are fully transparent; the rest are opaque and darken toward black as they approach the cutoff, over the fade width (0 turns fading off).
Seed hunt
Runs many seeds with the current parameters, final frame only, and lays them out side by side. Give a target wave vector to screen seeds by their network's spectrum first, so most runs land on it. Screening works best at small σ (1 to 2). Click a result to run it with animation.