How to reduce dot particles using point wrangle?

[maulen]

Hello! I want to reduce the particle points and tried to do using "point wrangle", but there are no results. How do you know to reduce the particle particles using "point wrangle"?
I threw off a short video GIF examples here and another project:

particle_point.hipnc

[anim]

1. use Unpack Points SOP instead of Convert VDB Points

2. you don't have @id attribute on your points, and you are compressing the points so having a valid @id on them is crucial, so make sure you enable id on your solver, recache and you should be fine

 

if however you really need to reduce only a single frame or you decide to recache without reseeding and without compressing, making sure your pointcloud is stable and you don't need @id, then you can use @ptnum in rand function instead

if (rand(@ptnum, chf("seed")) < chf("percent") ) {
    removepoint(0, @ptnum);
}

 

Edited April 26, 2020 by anim