Terrain

The terrain brush generates a terrain-like topography by combining different types of noise and Fractional Brownian motion.

Parameters
- Mode
- Scale
- Iterations
- Octaves
- Contrast
- Shift
- Gain
- Lucanarity
- Noise
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Parameters

Parameter	Description
Mode	Color mode (see below)
Direction	Direction. A value of `1` inverts the terrain.
Scale	Scale of the terrain
Iterations	Number of iterations, lower values produce less terrain features and high values more features. This can be roughly thought of as increasing the height-map resolution.
Octaves	Number of octives when for generating displacements of the terrain (small features). Higher values produce more features (but more noise) and lower values produce less features (and smoother terrain).
Contrast	Adjusts the contrast of the height-map. The default value of `50` represents the mid-point, valueas towards `100` increase the depth of high and low values. Where as values towards `0` produces smoother terrain. For low number of Iterations or Octaves, it might be necessary to increase the contrast.
Shift	Shift the mid-point of the height-map. The default value of `50` represents the normal mid-point.
Gain	Influence of each iteration. Effectively this multiplies each iteration.Smaller values produce smoother terrain, and higher values produce more turbulance and noise.
Lacunarity	Lacunarity
Noise	Additional color noise (without affecting terrain shape)
Tile X	Tile offset on the X-axis
Tile Y	Tile offset on the Y-axis

Tile X and Tile Y parameters are used to generate noise over multiple adjacent volumes. For instance, to create a terrain that exceeds the 256² size limit.