# Hydraulic Sediment

## **Overview**

The Hydraulic Sediment Filter combines hydraulic erosion and thermal erosion in one filter which allows it to create highly realistic erosion. It also provides sediment layer features with varying erodability to further enhance the realism of the terrain.

## **Parameters**

### **General Settings**

<table><thead><tr><th width="199.7999267578125">Property</th><th>Description</th></tr></thead><tbody><tr><td><strong>Iterations</strong></td><td>The number of iterations for which the simulation is run.</td></tr><tr><td><strong>Max Erosion Amount</strong></td><td>The maximum amount of material that can be eroded at each pixel.</td></tr><tr><td><strong>Level Step Multiplier</strong></td><td>Multiplier for the filter's erosion delta at each level step. This can help the filter to increase its power at higher levels, where the effect would normally be reduced due to the greater distance between locations (from the higher resolution).</td></tr></tbody></table>

### **Hydraulic Erosion**

<table><thead><tr><th width="199.7999267578125">Property</th><th>Description</th></tr></thead><tbody><tr><td><strong>Surface Erosion</strong></td><td>The strength of the erosion.</td></tr><tr><td><strong>Sediment Loss</strong></td><td>Steady amount of sediment that is suspended each step.</td></tr><tr><td><strong>Suspend Loss</strong></td><td>How fast a droplet disposes of sediment.</td></tr><tr><td><strong>Erosion Sample Offset</strong></td><td>Increases the droplet travel distance.</td></tr><tr><td><strong>Erosion Softness</strong></td><td>Softens the erosion result.</td></tr><tr><td><strong>Erosion Height Range</strong></td><td>Limits the erosion to a specific height range of the terrain.</td></tr><tr><td><strong>Flow Rotation</strong></td><td>Rotates the flow direction of a droplet, creating more dune-like sedimentation.</td></tr><tr><td><strong>Evaporation</strong></td><td>The amount of water that is lost in each simulation step.</td></tr></tbody></table>

### Rain

<table><thead><tr><th width="199.7999267578125">Property</th><th>Description</th></tr></thead><tbody><tr><td><strong>Rain Strength</strong></td><td>Constant fluid increase, that is added with each simulation step.</td></tr><tr><td><strong>Rain Probability</strong></td><td>Lowers the chance of rain appearing in a simulation step.</td></tr><tr><td><strong>Water Start</strong></td><td>The amount of available water at the start of the simulation.</td></tr></tbody></table>

### Wind

<table><thead><tr><th width="199.7999267578125">Property</th><th>Description</th></tr></thead><tbody><tr><td><strong>Wind Strength</strong></td><td>Adds additional wind to the water particles.</td></tr><tr><td><strong>Wind Direction</strong></td><td>Changes the direction of the wind.</td></tr><tr><td><strong>Wind Randomness</strong></td><td>Layers additional noise over the wind direction.</td></tr></tbody></table>

### **Thermal**

<table><thead><tr><th width="219.9000244140625">Property</th><th>Description</th></tr></thead><tbody><tr><td><strong>Thermal Erosion Strength</strong></td><td>The strength of the thermal erosion.</td></tr><tr><td><strong>Thermal Erosion Sediment Loss</strong></td><td>Constant amount of sediment that is placed at each simulation step.</td></tr><tr><td><strong>Sediment Transport Speed</strong></td><td>How fast thermally eroded sediment travels downhill.</td></tr><tr><td><strong>Thermal Erosion Slope</strong></td><td>The angle at which a pixel will become unstable and contribute to the thermal erosion.</td></tr><tr><td><strong>Thermal Sedimentation Slope</strong></td><td>The angle at which thermally eroded sediment will settle.</td></tr><tr><td><strong>Thermal Slope Smoothing</strong></td><td>Smooths the thermal erosions result.</td></tr></tbody></table>

### **Surface Layers**

<table><thead><tr><th width="199.7999267578125">Property</th><th>Description</th></tr></thead><tbody><tr><td><strong>Layer Strength</strong></td><td>Strength of the layering feature. Offers control for the lower layer ending and upper layer ending blending.</td></tr><tr><td><strong>Scale</strong></td><td>The scale of each layer. Decrease this value to get more layers.</td></tr><tr><td><strong>Height Offset</strong></td><td>Shifts the layers up and down.</td></tr><tr><td><strong>Layer Smoothing</strong></td><td>Smoothens the transition between layers.</td></tr><tr><td><strong>Variance Strength</strong></td><td>Adds noise to the height and offset of the layers.</td></tr><tr><td><strong>Variance Scale</strong></td><td>Adjusts the scale of the noise which is applied in the variance step.</td></tr><tr><td><strong>Variance Offset</strong></td><td>Shifts the variance noise.</td></tr><tr><td><strong>Variance Noise Octaves</strong></td><td>The octaves of the variance noise.</td></tr></tbody></table>

## **Results**

<div><figure><img src="/files/qzoC1RTSlH5kL4DOLk1Q" alt=""><figcaption></figcaption></figure> <figure><img src="/files/AjlGXzRMbK2ntsmLnS9Y" alt=""><figcaption></figcaption></figure> <figure><img src="/files/p96wXB0eSFCpDS4FEA4z" alt=""><figcaption></figcaption></figure></div>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.world-creator.com/reference/terrain/biome/filters/advanced-erosion/hydraulic-sediment.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.