(I adjusted the levels a bit for the thumbnail) You will definitely need turbowarp for this: https://turbowarp.org/1197529083?turbo&hqpen&size=960x720 If you're wondering what I changed: 480 x 360 pixel screen --> 960 x 720 (4x the area) every pixel is an initial value --> every 1/4 pixel (so 4x pixels per unit area) (so 16x as many initial values) - turbowarp is amazing 100 iterations --> 10,000 - turbowarp is really amazing and the pen is half the diameter