Anyone knows why is my particles thick from far away ?

Hello there, so here is my problem:
I followed a quick and nice tutorial on how to make cigarett smoke, tweaked few things, and obtained a good result. But here is the catch, as you can see, it looks very good from a close POV (photo 1), but once i get the view a little further behind, the smoke gets all big and smoshy, wich really ruins my screenshot. Does anyone know how to make the particles always render thin no matter the distance ? Thanks in advance.

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I found solutions;