Greetings, I have a problem with pop sim
Basically I randomize the pscale after the simulation with a Randomize Attributes SOP and then I copy to points some spheres
The problem is that I kill some particles and when they die the pscale is changing from particle to particle and not stick to the same particle all the time.

To be more precise I what to export these particles to cinema 4d and render them as instances there, but this is happening with redshift instancing too.

You need the randomization to be based on something other than @ptnum. When particles die, the index of each particle (@ptnum) changes, which will scramble your randomization seed. Instead, randomize based on the i@id attribute by enabling “Seed Attribute” on the Attribute Randomize SOP.