Hi, I have a VOPSOP propagating white color across some points. All the points start off as black. I want some logic to say once you change to white you never change back again.....because the white color is driving the ACTIVEVALUE in the autodopnetwork.....and my objects are becoming alive and the dying/freezing again..... Can someone help me do this please? and please be specific, I haven't been using Houdini for that long. thanks