How to realize interactive snow in UE5

trying this myself in unreal 4, but while I get trails, the updates seem very laggy. any chance you can share how you did this?

Using the ray wenderlich tutorial: Creating Snow Trails in Unreal Engine 4 | raywenderlich.com

Rendertarget and what is working fine, but updates to the vhfm seem laggy. They show, but are chunky/batched…