How can I stun my particles ?

Hello !
I’m currently working on a project where I’m supposed to make a Nebula. So I’m using Cascade to make my clouds but I can’t find where to “stun them” so they won’t move.
I’ve tried stuff in the “initial velocity” module but it’s not working…
I’ve been looking everywhere but I’m unable to find a solution to my problem.

Thank you very much

Try and just spawn them with no velocity in the form of a shape, like a sphere.

Set them to Burst spawn, with emitter loops set to 1 and a lifetime of 0.00

It should spawn them 1 time and they will live forever using all init attributes. (color over life etc. won’t wok)