Because particle Trace is simple one node and it can made particle trace with color I change it to polygon with another node, it is faster to use RS wire to do this but this time I don't know that. It's 10000 points scattered and move around. Actually I have a problem Houdini output mp4 has set houdini color space, as this result sRGB mp4 player show it dark, I learn Davinch Resolve as fast I can, but it's boring to edit video in editor. And I don't know my Linux use what color space use, I would ask chatGPT about it.