Thanks, but I don’t believe LODs would work (at least not if your game will have scalability options) because the LOD distances can be modified by changing the view distance setting - so if someone with an older computer set their view distance to very low, it’d automatically switch into higher LODs even when the particles are close, and they’d get slowdowns from overdraw. Also someone with a faster computer set their view distance to very high, the LODs would stay at the lower ones more and they’d get reduced spawn rates 
So this would make the scalability options kind of useless.
EDIT: Chosker beat me to it. Anyways there must be an option in cascade to do it right?? I believe smoke particles stop drawing up close in Fortnite but I’m not sure how they did it…