The method that the bound material layer will be slumped. Either Smooth or Granular.

The smooth operation will quickly diffuse the material. This results in slower transport but ensures a smooth field useful for liquid-like transport mechanisms.

The granular operations moves the material in quantized chunks. This allows for faster transport, but will result in a chunky field, useful for boulder-like transport mechanisms.

How many iterations of slumping to simulate.

How fast material spreads across the terrain in each iteration.

The maximum slope, measured in degrees from the horizontal, at which loose solid material will remain in place without sliding.

The name of the repose angle mask. This only works when slump mode is set to Granular.

Scales the height field before slumping. This increases contrast in the slumping.

Entrainment is process of material lifting by an agent of erosion. This controls the percentage of the entrained material that is dragged with the slumping material in each iteration.

The name of the stability mask. This mask can be used to make to debris more stable.

Controls the chunkiness of the material flow. A lower value would make the flow more continuous and a higher value would make the flow more chunky.

Controls how biased the movement of material is. Setting it to positive values would bias the movement in the direction of the principal axes, and when set to negative values, it would bias the movement at angles of 45 degree relative to the principal axes. The default value of zero would mean no bias in any direction.

The name of the grid bias mask.

Random seed to make erosion vary for the same set of variables on the same input.

When turned on, it would erode the bedrock layer while slumping the material layer.

Controls how many meters of bedrock or debris (here entrained material) is eroded every iteration.

Controls the softness of bedrock or debris (here entrained material). Higher values would make the terrain easier to erode, causing deeper incisions, more sediment, and more debris being deposited as a result.

The name of the erodability mask.

Controls the rate at which erosion happens. This is a multiplier on Erodability.

Sets the angle at which the riverbank rests relative to the riverbed. Lowre values would make wider and flatter river channels.

The name of the bank angle mask.

When material moves beyond the edge of the heightfield, it is erased. Turning this off causes the material to accumulate at the edges.

Place material back into the bedrock (height layer) for further calculations such as erosion.

Proportion of debris from thermal erosion that is deleted. This simulates wind carrying away a certain amount of debris rather than it all accumulating. The default is 0 (no deletion). Negative values correspond to the debris being less dense than the rock, so one unit of eroded rock produces more than one unit of debris.

Stop erosion when the debris layer reaches this depth.

The iteration where erodability would get to its maximum value.

Controls how much of the set erodability would the material have on its initial movement. It would increase over the set spread iterations until the max iteration, where it would stay at maximum set value.

Control how much the slope of the terrain would affect the erosion amount. Higher values would increase the slope effecting the erosion, and lower values would decrease it. Lowing this value would increase erodability as a result.

A multiplier on Erosion Rate that would cause a change on the riverbed only. Increasing this value would cause a more aggressive erosion on the bed, and as a result, it would increase the depth of the incisions.

Controls the rate at which the excess sediment turns into debris. A value of zero means no sediment is turned into debris, while a value of one will convert all created sediment into debris, and the bedrock would in turn be protected more by the created debris.

The name of the deposition rate mask.

The amount of sediment that can be carried per unit of moving water. The higher the capacity, the longer the material can erode before it starts depositing its excess sediment.

A multiplier on Erosion Rate that would cause a change on the riverbank only. Increasing this value would cause a more aggressive erosion on the bank, and as a result, it would increase the width of the incisions.

The maximum of bank to bed water column height ratio that will be considered as river bank bank. Ratios higher than this number will not be considered as bank during erosion.

Add new fields to the output containing information on the cumulative and average flow directions.

When greater than 0, smooths the contents of the flow layers. Higher values do more smoothing.

A scale on the effect of smoothing in each iteration.

Name of the field to use as bedrock in the slumping simulation. Default is height.

Mask field marking on which parts of the heightfield to simulate slumping. Default is mask.

If the input already has a debris layer from a previous Heightfield Erode you can put its name here and the algorithm will treat it as already-loose soil.

Name of the field to use as sediment in the slumping and erosion simulation.

When Calculate flow fields on the Flow tab is on, the node outputs a flow layer representing the cumulative material flow. This layer has two signed components (x and y) representing the flow direction in voxel space. Because this is cumulative, if material flows left, then flows right, those two motions will cancel and the x component would be 0.

When Calculate flow fields on the Flow tab is on, the node outputs a flowdir layer containing vectors showing the average direction of flow at each voxel. This is converted from voxel-space into geometry space. Note it does not include any change in height.