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fade out every particle from particles system

Hi all,

In my tetris game, i added a particle component in my Cube blueprint (whenever a cube lands, i wanna get a dust effect). The particle system works fine, and now i’d like to fade out (alpha) the former, like if the dust was dispersing in the air.
I’d like every single particle to fade out at the same time. How to do so please ?

I just found the solution :

In blueprint i used Activate particle node, added delay node, then added Deactivate particle node. When the emmitter is deactivated particles life time is not over yet so they die one by one, which gives a kind of fade out