How can I group each nth point in sops ?
I guess some kind of $PT modulo N but I cant find any fitting examples ..

Figured it out, but still have a problem.
With filter expression $PT % 20 in the group sop i can remove every nth point in a flip simulation, but why does the pointnumber of each particle change each frame ?
I want to decimate the particles in a flip simulation without too much flickering.

Figured that one out too .. found the Add ID Attribute in the flip solver and used @id % 10 == 0 as grouping pattern.