I have been searching for a solution to this for ages, does anyone know the correct way to have a typical infection solver be sourced by a pops sim? an example for needing this would be if you were making a flamethrower sim but needed the fire to actual be able to spread to objects that the "fuel" or "flame" touched in the scene. I tried doing this with the pyrospread solver but it only sources the beginning pops and doesnt update the stream pops group. everything works fine as long as the source input doesnt change which is the problem. someone had said using sop solver and attribute transfer would be a way to fix this but i have no idea how to make it work ive been stuck for months. any help would be greatly appreciated. another example if it wasnt clear would be a dragon breathing fire on to a character, how would you source a fire that could spread once the fire from the dragon collides with the character thank you!