Wide Flows

Overview

The Wide Flows Erosion filter offers a highly adjustable particle-based erosion and thinking of it as a simulation running many individual droplets is key to understanding all of its properties. The filter simulates a water droplet with a set amount of water that influences its carrying capacity and ability to erode the terrain. The droplet moves downwards at a constant rate, eroding and depositing sediment in its path.

Parameters

• Seed

  Changes the seed for the rain droplet distribution and other parameters used in the simulation.#

Rain

• Rain Map Allows you to specify a mask to control where rain drops are spawned.

• Rain Strength

  This lets you adjust the amount of droplets spawned on the terrain. You can also further modify the rain strengths on each level step in the level step editor below the slider. The level step that a droplet runs on heavily impacts the structures the filter will produce. Lower levels generate wider crevices and sedimentation, while higher levels create more intricate details.

General

• Inertia

  Controls how fast a droplet will react to a changing direction. A higher Inertia means it will stay for longer on its previous path even if the downward direction changes.

• Initial Water

  Sets the amount of water a droplet has when it is spawned. The water influences its maximum lifetime and the amount of sediment it can carry.

Sediment Transport

• Transport Rate

  Modifies the amount of sediment a droplet can carry.

• Sediment Loss

  This describes a constant percentage of sediment that a droplet will lose in every movement step it takes.

• Erosion Multiplier

  A factor that affects the final amount of sediment eroded from the terrain. Any other value than 1 can disturb the equilibrium of the filter and add/remove matter from the terrain.

• Deposition Multiplier

  A factor that affects the final amount of sediment deposited onto the terrain. Any other value than 1 can disturb the equilibrium of the filter and add/remove matter from the terrain.

• Erosion Map

  Allows you to mask the erodability of the terrain.

Flow Modification

• Flow Rotation

  Alters the starting direction of a particle.

• Random Rotation

  Normally, a droplet will have a downslope path when spawned. Increasing this value will randomize it.

• Wind Direction

  Allows you to set a wind direction, which will influence a particle's movement direction.

• Wind Strength

  Controls how strongly droplets will be affected by the wind.

Results