This project uses two emitters, one to create the fire and the other to create the smoke. The smoke is created from a number of circular particles at very low alpha which overlap to create the random smoke distribution. The fire is created from elliptical particles that are orientated so their pointy end points in the direction they’re traveling.
Source
https://www.richardlord.net/flint-particles/examples/fire-and-smoke-3d.html
Fire and Smoke 3D screenshots
