Use case - Dual erosion

This sample creates a terrain using rock erosion and hydraulic erosion simulation.

See Hydraulic erosion and Rock erosion for details on these erosion simulation nodes.
Select Help > Samples to open your local folder where the samples are installed.

Several groups of nodes are used in this project to help you understand better the different effects of the procedural process. See Grouping nodes for details on how to create groups of nodes.

• Base mask: The first step creates a base mask by multiplying a mask from the heights of a Perlin noise generator, which has the same size and resolution as the input terrain, and a Circular symmetry mask, which creates a circular cone-shaped mask edited by a curve. At each vertex, the value of the output mask is the multiplication of the values of both input masks.

• Base: The base terrain is composed of three Perlin noise generators to which the base mask is linked through optional connectors. A series of connected transformation, composition, and generation nodes creates the output base terrain.

• Erosion: The output base terrain is then linked to a series of nodes including Hydraulic erosion and Rock erosion to improve the shape of the terrain.

• Color map: A color map is imported and then applied to the erosion output terrain.

• Masks: Lastly, masks from the erosion output terrain's heights, slopes, angles, and curvature are exported.