Hi @eco_bach2, I’ve been testing these plugins and they are all based on the same technique (i.e. Niagara). There are not many differences currently, but you might find this useful: Introduction to Gaussian Splatting in UNREAL Engine | Community tutorial
There’s also another solution on the market called Volinga (https://volinga.ai/), they have a UE plugin as well, but it’s not free (just for testing purposes, with watermark).