This GPU particle system is driven by a custom Niagara module that uses a

Vector Field(Fluid Grid ASCII)

 generated in Houdini to control particle motion.

The velocity field is extracted from a Houdini pyro simulation and then used inside Niagara to influence the direction, flow, and overall movement of the GPU particles.

The main goal was to transfer the motion characteristics of the pyro simulation into a real-time Niagara particle system.