World Creator - Documentation and Support

Related articles:

• Filters Introduction
  
• General Filter Parameters

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.

TABLE OF CONTENTS

• Overview
• Parameters
  • Base Settings
  • Hydraulic Erosion
  • Water Percentage
  • Thermal 
  • Surface Layers
• Results

Parameters

General Settings

• Max Erosion Amount
  The maximum amount of material that can be eroded at each pixel.

• Iterations
  The number of iterations for which the simulation is run.

• Level Step Multiplier
  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).

Hydraulic Erosion

• Surface Erosion
  The strength of the erosion.

• Sediment Loss
  Steady amount of sediment that is suspended each step.

• Suspend Loss
  How fast a droplet disposes of sediment.

• Erosion Sample Offset
  Increases the droplet travel distance.

• Erosion Softness
  Softens the erosion result.

• Erosion Height Range
  Limits the erosion to a specific height range of the terrain.

• Flow Rotation
  Rotates the flow direction of a droplet, creating more dune-like sedimentation.

• Water Start
  The amount of available water at the start of the simulation.

• Rain Strength
  Constant fluid increase, that is added with each simulation step.

• Rain Probability
  Lowers the chance of rain appearing in a simulation step.

• Evaporation
  The amount of water that is lost in each simulation step.

• Wind Strength
  Adds additional wind to the water particles.

• Wind Direction
  Changes the direction of the wind.

• Wind Randomness
  Layers additional noise over the wind direction.

Water Percentage

• Levels
  Controls the amount of water added at each level.

Thermal 

• Thermal Erosion Strength
  The strength of the thermal erosion.

• Thermal Erosion Sediment Loss
  Constant amount of sediment that is placed at each simulation step.

• Sediment Transport Speed
  How fast thermally eroded sediment travels downhill.

• Thermal Sedimentation Slope
  The angle at which thermally eroded sediment will settle.

• Thermal Erosion Slope
  The angle at which a pixel will become unstable and contribute to the thermal erosion.

• Thermal Slope Smoothing
  Smooths the thermal erosions result.

Surface Layers

• Layer Strength
  Strength of the layering feature. Offers control for the lower layer ending and upper layer ending blending.

• Scale
  The scale of each layer. Decrease this value to get more layers.

• Height Offset
  Shifts the layers up and down.

• Layer Smoothing
  Smoothens the transition between layers.

• Variance Strength
  Adds noise to the height and offset of the layers.

• Variance Scale
  Adjusts the scale of the noise which is applied in the variance step.

• Variance Offset
  Shifts the variance noise.

• Variance Noise Octaves
  The octaves of the variance noise.

Results

rocky erosion	strong rocky erosion
deep erosion	desert erosion