How to kill and make transparency along the curve of infinite particles through manual deactivation of Niagara in blueprint?

[Eugenietto]

Hi all!

I have a Niagara system. It contains 1 particle with an infinite lifetime. Through blueprint I turn off the system using “deactivate”. How to smoothly reduce the transparency to 0 and then kill the particle? The particle state has useful checkboxes “Let Infinitely Lived Particles Die When Emitter Deactivates” and “Loop Particles Lifetime”. But I don’t understand what needs to be added to the color module so that the transparency decreases only after the system is deactivated. When I add a curve to alpha, it loops over the lifetime of the particle.

Thanks in advance!

[M0okA]

Take a look a this

[UE; Niagara] Animating particles after System Deactivation

Not sure if this is a niche use case, I found myself using it more and more and just thought I’d share! TL;DR A niagara module that lets you animate particles after the system has been deactivated. Tutorial/node graph at the bottom. Scenario #1: You have an infinite particle that is supposed to fade in and out based on whether the System is Active or not

Scenario #1 Infinite particle

In this example, the colors are just to help visualize the ‘states’ Green - system activated, fading in Blu…

[Eugenietto]

Thanks a lot! I don’t know how I missed this