Hey there, I'm pretty new in Houdini and I'm currently working on my first kind of big project. So i've made this growing system (infection like) with a pop network and I would like to make ONLY my crystal melting (not the infection) once all the crystal is cover by the infection (i put only two points of infection in the file attach but they will be more), to get an effect similar to acid corrosion. I also would like to put smoke on my growing system/infection. I've already made all my elements seperate (growth system, melt and smoke in 3 differents hip files) but I have really no idea on how to arrange it together, I spent fews days to try to figure it out but i'm running of idea. Any help, advice or idea would be much appreciate, Thanks a lot, K.