You could use the interpolate export method which will give you a position that you could attach a particle system to. It would be similar to a socket on a skeletal mesh. Or attaching a particle system directly to a bone. But this would be for cached simulations. If your question is specific to Niagara I’d ask Shaun or Wyeth over in the Niagara thread. Niagara / unreal GDC - #136 by ShaunKime