I see how this is done with Houdini export but I don’t have Houdini, is there a way to bring a particle point cache into Niagra from other DCC programs like 3dsmax?
You can refer to following document to write a small program in C++ or Python to generate hjson files.
[Houdini Engine for Unreal: Houdini-Niagara Plug in (sidefx.com)]
(Houdini Engine for Unreal: Houdini-Niagara Plug in)