# `gs.materials.SPH.Liquid`

`gs.materials.SPH.Liquid` drives an entity through the Smoothed Particle Hydrodynamics solver as a liquid, such as water. Use it for free-surface fluids simulated with particles. It is the only material in the SPH family.

```{eval-rst}
.. autoclass:: genesis.engine.materials.SPH.liquid.Liquid
```