Billow noise is a variant of perlin noise, that adds together absolute values of samples. It produces cloud-like shapes as a result.

Billow noise usually outputs values between -1 and 1 range, and the mean value is 0.

Node inputs/outputs

Module input/outputs are the same as the perlin noise.

The module’s constructor needs:

  • Frequency : defines the frequency of the first octave. Frequency represents the number of cycles per unit length that a generation module outputs.
  • Persistence : a multiplier that determines how quickly the amplitudes diminish for each successive octave.
  • Lacunarity : a multiplier that determines how quickly the frequency increases for each successive octave
  • Octave count : the number of octaves control the amount of detail of the perlin noise. Adding more octaves increases the detail of the perlin noise, but with the drawback of increasing the calculation time.
  • Seed

The output value is a Generation Module


Frequency evolution

Frequency = 1

Frequency = 5

Frequency = 10

Lacunarity evolution

Lacunarity = 0.5

Lacunarity = 2

Lacunarity = 5

Octave count evolution

Octave count = 2

Octave count = 6

Octave count = 12