# `gs.materials.SF.Smoke`

`gs.materials.SF.Smoke` drives an entity through the Stable Fluid solver as a gaseous medium such as smoke or hot gas. Use it for grid-based fluid effects where you want advected density and velocity fields rather than particles. It is the only material in the SF family.

```{eval-rst}
.. autoclass:: genesis.engine.materials.SF.smoke.Smoke
```