Hi! This is me trying to understand the popSolver in houdini. What is the difference between this two inputs and why they are both wired like that by the shelf (Check the attached image) The particles seems to do the same thing if I rewired as I showed in the second network and they don't do anything at all with the 3rd one. Also why is the wire dotted between the popsource and the popstream, They only work together is both inputs (pre and post) are wired like that. Thanks and pardon my English :$