> For the complete documentation index, see [llms.txt](https://docs.world-creator.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.world-creator.com/reference/terrain/simulation-layers/fluid.md).

# Fluid

## Overview

The Fluid Simulation Layer executes a fluid simulation on your terrain, which can be everything from really fast flowing water to more viscose substances like lava.

## Video Guide

{% embed url="<https://vimeo.com/1029720023>" %}
World Creator Guide
{% endembed %}

## Parameters

<table><thead><tr><th width="179.699951171875">Properties</th><th>Description</th></tr></thead><tbody><tr><td><strong>Viscosity</strong></td><td>The viscosity of the fluid controls how fast and fluid the matter reacts. This allows you to change the appearance of your fluid from water to a thicker substance like lava.</td></tr><tr><td><strong>Speed</strong></td><td>The speed at which the liquid travels over the terrain.</td></tr><tr><td><strong>Wind Direction</strong></td><td>Controls the direction of the additional wind force.</td></tr><tr><td><strong>Wind Direction</strong></td><td>Controls the direction of the additional wind force.</td></tr><tr><td><strong>Wind Strength</strong></td><td>Adds an additional wind force to the velocity of the simulated matter.</td></tr><tr><td><strong>Wind Level Multiplier</strong></td><td>Links the wind strength to the current level step. This is helpful because the distance between pixels increases with each level step and the effect needs to be scaled with that in mind.</td></tr><tr><td><strong>Wind Randomness</strong></td><td>Randomizes the wind direction, allowing for a more natural result.</td></tr><tr><td><strong>Spawn Level</strong></td><td>In which level the sediment gets added to the terrain. </td></tr><tr><td><strong>Spawn Amount</strong></td><td>The amount of sediment added to the terrain.</td></tr></tbody></table>

## Results

<div><figure><img src="/files/7DxJhDKvjYGOseGmF9wv" alt=""><figcaption><p>water over the whole terrain</p></figcaption></figure> <figure><img src="/files/0CMbmEmXToTAPHCNHlU6" alt=""><figcaption><p>masked spawn</p></figcaption></figure></div>


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