Noise Fractal

Description

Fractal noise, also called Pink noise is a signal with a frequency spectrum such that the power per frequency interval is inversely proportional to the frequency of the signal. Thus, each octave interval (halving or doubling the frequency) carries an equal amount of noise energy.

There are four types of noise presets to choose from :

Smooth	Turbulent	Warp	Cellular

*Tip : Noise can be very useful as static or animated maps or ramps in other effect nodes..

Properties

Global

• Clock : Animates the noise over time. To create animated noise connect a Graph Time node to this input and toggle your Graph to play.
  Default : 0.0

• Speed : Sets the speed for the noise movement over time. This property will have no visible impact unless the Clock property is animated (see above).
  Default : 5.0

• Complexity : Sets the number of iterations for the noise production. Lower values give less detailed noise. Values higher than 6 will consume more ressources for very little visible gain.
  Default : 6

• Offset : Offsets the noise along the X and Y axes.
  Default : (WIDTH ; HEIGHT)

• Sub Offset : A second offset for the noise along the X and Y axes.
  Default : (WIDTH ; HEIGHT)

• Rotation : Set a rotation on the noise.
  Default : 0.0

• Scale : Set a scale for the noise. Lower values give smaller noise (e.g. zoom out). Higher values give larger noise (e.g. zoom in).
  Default : (1.0 ; 1.0)

• Brightness : Standard Brightness control.
  Default : 0.0

• Contrast : Standard Contrast control.
  Default : 1.0

• Color 1 : Set the first color for the noise.
  Default : White : 255 / 255 / 255 / 255

• Color 2 : Set the second color for the noise.
  Default : Black : 0 / 0 / 0 / 255

• Seed : Sets the seed for the randomness.
  Default : 12345.123

*You can unfold and set Min/Max values for the above properties, however, defaults have been set that generally constrain the values in between default Min/Max values that are proven to work well for this effect.

Options

• Type : Choose the noise type. Choices are : Smooth, Turbulent, Warp, Cellular
  Default : Smooth

• Interpolation : Choose the interpolation type for the data between two frames. Choices are : Linear, Cubic, Quintic, Block
  Default : Linear

Inputs

Outputs

Example

• Clock : Animated with the Graph Time
• Speed : 3.0
• Complexity : 6.0
• Brightness : -0.1
• Contrast : 1.25
• Type : Smooth
• Interpolation : Linear
  All other properties were left to default values.

Noise type previews

The Scale has been set at 2 for a better view of the noise type.

Noise Type	Smooth	Turbulent	Warp	Cellular
Preview
Complexity	2	2	2	2
Preview
Complexity	6	6	6	6