I watched this awesome video: [Introduction to Niagara Fluids in Unreal Engine 5] In the video, the author sets up a Niagara system from a template, and then uses the actor tag ‘collider’ to make a static mesh (sphere) interact with the fluid simulation. It works quite well. However, …

Dear @Mind-Brain , I was missing a key step: I had to set the “baffin” actor to movable in the actor’s mobility setting. With the plasma gun: With the lightning / Brownian gun: