I've tried a bunch of methods using C2, and closest I've come to is using 100+ particles, but it just doesn't seem resource efficient. Not blaming C2 engine, since duplicating this effect in Unity/Unreal/other engines using particles are also resource intensive.
Does anyone know how these large professional game companies accomplish this, both efficiently and seamlessly?
Another way is to use a sprite but how to generate such a sprite in the first place?
screenshot is from starcraft 2