Previous simulations was fixed speed and without any particular forces to guide the particles. With this build its still fixed speed however with the addition...
"Huh i wonder if an image can be used to guide the particles?" .... not much longer later we have the following https://twitter.com/S_BatMan/status/1287326799966470145 https://twitter.com/S_BatMan/status/1287356996694323202 https://twitter.com/S_BatMan/status/1287387197101006850