So, I'm building a jump map. It has nine different stages each with a different color scheme. I already made a custom rocket trail+explosion for my map as well, however I would like my rocket trails/explosions to change color based on what stage they are in. Example: https://www.youtube.com/watch?v=6I2H8VZgPyc I've played around with the particle systems to know I can use "color light from control point" in the particle editor, but this doesn't quite do justice as the distances are all spherical, and since my map is large, I would have to make a fairly complicated system of control points in order to have the colors change with the stages correctly, so that they don't overlap or leave gaps in corners. Now I was wondering if there is any easier way to go about doing this in hammer, for instance if tf2 can check if a particle is in a brush and changing the colors based on what brush its in. I'm not particularly familiar with hammer's different entities/brushes and so forth so any help would be much appreciated. As you can imagine this isn't an essential feature but it would be really cool to have the trails match the color schemes in my map.