Fractal Noise 3D
Zero-centered 3D fractal noise created by summing several octaves of 3D Perlin noise.
Parameter Types
Parameter descriptions
AmplitudeThe intensity of the generated noise. The higher the amplitude, the more pronounced the variations of the noise pattern.
OctavesThe number of layers of 3D Perlin noise that the node sums together. The default value is 3.
LacunarityThe exponential scale between each octave. This value determines how different each successive octave or layer of Perlin noise is from one another. The default value is
2.0DiminishThe rate that the amplitude of each successive octave is decreased. Maintain the value for this parameter in the range of
0.0-1.0. The default value is0.5.PositionThe 3D coordinates at which the data is read in order to map the texture onto a surface. The default is to use the current 3D object-space coordinates.
Discussion
The Fractal Noise node produces its output by summing up multiple layers or octaves of 3D Perlin noise. The more octaves in the fractal noise, the finer the detail of the noise. Each successive octave differs from the previous; the Lacunarity and Diminish parameters determine the difference. Lacunarity refers to the difference in frequency between each octavex. As this value increases, the resulting fractal noise becomes more uneven and less smooth. Diminish refers to how the amplitude changes between octaves. A value of 1 indicates no change to the amplitude. As the value decreases, the amplitude from octave to octave decreases more quickly. Below is an example of a simple node graph that uses the Fractal Noise 3D node to generate a black and white pattern procedurally:
[Image]
Multiply the incoming position with a constant float. The float changes the frequency of the generated noise to a higher number that corresponds with the pattern repeating more often. Below, the resulting texture applies to a cube with various values for each parameter. All values are the default, unless specified under the image.