Fractal Noise Copernicus node

Generates fractal noise.

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Parameters
- Range
- Pattern
- 3D Noise
- Fractal
Inputs
Outputs

This node generates a noise pattern using a fractal approach. The same underlying noise is sampled at increasing frequencies and mixed together. Use the Fractal Noise 3D COP if you want the source location to be the pixel’s world coordinates instead of its image coordinates.

For example, use this node to create cloudy, smoky, or TV static patterns.

Parameters ¶

Signature

The layer type that the source accepts.

See Signatures for more information.

Range ¶

Amplitude

The scale of the noise, which the node applies before the Center adjustment.

Note

Layers can store negative numbers and values above one, so this may result in out-of-bounds values. You can use a Clamp COP to enforce the range afterwards.

Center

The center of the output noise range.

Contrast

The amount of contrast to apply to the noise before the Amplitude and Center parameters. You can use this parameter to make the noise more extreme without exceeding the 0 to 1 range.

Pattern ¶

Noise Type

The underlying noise function that’s iteratively sampled to generate the fractal noise.

Torus

Create 4D simplex noise evaluated on a flat torus. This generates noise that’s periodic by construction, which means it doesn’t clamp or round settings to enforce periodic behavior (unlike other noise types).

Perlin

Create Perlin noise on a regular grid. This type of noise generates more natural results.

Worley Cellular F1

Create Worley noise using its primary distance value, which is the distance to the closest worley point. This generates a cell-like noise.

Worley Cellular F2-F1

Create Worley noise using the difference between its second closest and closest points. This generates a cell border-like noise.

White (Random)

Create white noise where each noise element is given a constant but random value.

Per Component

Computes a separate noise for each channel of the output. If off, the output is grayscale for mono and non-mono layers.

Metric

When Noise Type is Worley Cellular F1 or Worley Cellular F2-F1, this is how to define different metrics for computing the distance to a point.

Euclidean

The usual L2 distance metric, which results in circular shapes.

Manhattan

The maximum of the two axial distances, which results in diamond shapes.

Chebyshev

The sum of the two axial distances, which results in square shapes.

Element Size

The size (in image coordinates) of the basic element of the noise. You can turn on the Per-Component Controls button to adjust this further using the Element Scale parameter.

Element Scale

When the Per-Component Controls button is on, this is the per-axis scaling of the element size for anistropic noise.

Offset

The offset of the noise function in image coordinates.

Tile Size

The size of a single tile of noise. The noise periodically repeats in this size. The size is in image coordinates, so the default is for the entire default canoncial image. If you have a non-square image, this should match the aspect ratio.

Note

If on, values for parameters like Element Size and Lacunarity are rounded or clamped to make them valid. This is because these types of parameters must meet certain conditions for the noise to be tileable.

3D Noise ¶

3D Noise

Evaluates the noise in a 3D space. The first two dimensions are the location in the image and the third is controlled separately.

Animate

Implicitly adds time to the third coordinate.

Pulse Length

The feature size of the noise in the third dimension. This is the rate at which the noise switches appearances.

Time Offset

The fixed offset for evaluating the noise.

Time Scale

The amount by which to scale the computed time.

Loop Length (sec)

This is the time in seconds at which to repeat. This clamps other options to enforce periodic behavior.

Fractal ¶

Max Octaves

The amount of times to scale add together the noise.

Lacunarity

The amount to scale the noise for each iteration, which is rounded to an integer value for periodic noise.

Roughness

The amount to scale the amplitude of each successive noise.

Inputs ¶

size_ref

A representative layer that determines the size of the output image and controls the metadata.

pos

An optional UV layer with a value that’s used instead of the pixel’s image coordinates for the noise.

time

Each pixel uses this layer’s value for the time.

Outputs ¶

noise

The computed noise.

See also

Copernicus nodes

Auto Stereogram

Generates an image with a 3D illusion.
Average

Takes the average of all input layers.
Blend

Blends two layers together.
Block Begin

Start of a block, containing its inputs.
Block End

End of a block, declaring its outputs.
Block to Geometry

Compiles a block and produces its geometry representation.
Blur

Applies a blur to a layer.
Bokeh

Creates a Bokeh effect by expanding each pixel by an aperture shape.
Bounding Rectangle

Finds the bounding rectangle of a mask.
Bright

Brightens a layer.
Camera Import

Creates a layer in a camera’s space.
Camera Properties

Adjusts the camera properties of a layer.
Channel Extract

Extracts a channel from a layer.
Channel Join

Combines multiple Mono layers into one multichannel layer.
Channel Split

Divides a layer’s channels into Mono layers.
Channel Swap

Swaps channels within a multichannel layer.
Checkerboard

Creates an alternating checker pattern.
Chladni Cymatic Patterns

Generates interference patterns that represent various vibration modes.
Chroma Key

Keys an input based on hue, saturation, and luminance ranges.
Chromatic Aberration

Adds chromatic aberration to your image.
Clamp

Clamps an input layer.
Combine Normals

Blends two normal maps together.
Compare

Creates a mask by comparing two layers.
Constant

Initializes pixels to constant values.
Contact Sheet

Arranges input layers into a contact sheet.
Contrast

Applies contrast to a layer.
Convert Normal

Converts normal layers between signed and offset.
Convolve 3×3

Convolves a layer by a 3×3 kernel.
Crop

Crops a layer to a new size.
Cross Product

Performs a cross product of two RGB layers.
Cryptomatte

Builds a matte from cryptomatte layers.
Cryptomatte Decode

Decodes a cyrptomatte into coverage and ID.
Cryptomatte Encode

Encodes a coverage and object hash into a cryptomatte layer.
Denoise AI

Denoises an input layer.
Denoise TVD

Removes white noise from an image.
Derivative

Computes the derivative of the source layer along the x- and y-axis.
Dilate Erode

Dilates or erodes a layer.
Distort

Distorts an input layer.
Dot Product

Performs dot product between two layers.
Edge Detect

Detects edges in the input image.
Edge Detect by Contour

Detects varying-width silhouette lines.
Edge Detect by Depth

Detects varying-width self-occluding silhouettes.
Edge Detect by Normal

Detects varying-width crease-lines.
Eikonal

Computes distances by solving the Eikonal equation.
Equalize

Equalizes colors by stretching or shifting their range.
Error

Generates a message, warning, or error.
Extrapolate Boundaries

Fills empty areas of an image using colors at the edges of non-empty areas.
Feather

Smooths out sharp changes in contrast.
File

Loads an image or video from disk.
Fill

Fills a layer with a constant value.
Flip

Flips a layer horizontally, vertically, or diagonally.
Font

Rasterizes text onto a layer from Type 1, TrueType, and OpenType fonts.
Fractal Noise

Generates fractal noise.
Fractal Noise 3D

Generates fractal noise from 3D locations.
Function

Applies a mathematical function to a layer
Gamma

Applies gamma correction to a layer.
Geometry to Layer

Converts a 2D volume into a layer.
Glow

Adds glow to an image based on its luminance.
HSV Adjust

Converts between RGB and HSV color spaces, or modifies HSV.
Height to Ambient Occlusion

Imagines a sphere for each pixel and determines how occluded that sphere is based on its surroundings.
Height to Normal

Converts a height layer to a normal layer.
Hex Tile

Randomly tiles texture.
Histogram

Builds a histogram from a layer.
ID to Mask

Creates a mask from an ID layer based on filtering parameters.
ID to Mono

Converts an ID layer into a mono layer.
ID to RGB

Converts an ID layer into an RGB layer.
ID to SDF

Computes a Signed Distance Field from changes in ID values.
Illegal Pixel

Detects and then fixes or highlights illegal pixels in images.
Input

Fetches the input to a subnetwork.
Invert

Inverts a layer.
Invoke Block

Runs a block using inputs plugged into this node.
Julia Fractal

Computes the Julia set to create a fractal.
Kuwahara Filter

Applies the Kuwahara filter, which creates painterly effects.
Layer

Generates a layer.
Layer Attribute Create

Adds or edits user-defined metadata on a layer.
Layer Properties

Edits basic layer metadata.
Layer to Geometry

Converts a layer into a 2D volume.
Light

Lights a layer given a light direction and normals.
Match Camera

Transforms a layer to match a reference camera.
Median

Applies a median filter to an image.
Mirror

Mirrors an image based on an arbitrary number of planes.
Mono

Converts a layer to mono.
Mono to ID

Converts a mono layer into an ID layer.
Mono to RGB

Converts a mono layer into an RGB layer.
Mono to RGBA

Converts a mono layer into an RGBA layer.
Mono to SDF

Computes a signed distance field from an iso-level of a mono layer.
Null

Passes inputs to the outputs.
OCIO Transform

Converts color spaces using OCIO transforms.
ONNX Inference

Applies inference from an ONNX Machine Learning model.
OpenCL

Executes an OpenCL kernel on layers.
Output

Collects the outputs of a subnetwork.
Polar to UV

Converts polar coordinate pixels to Cartesian pixels.
Position Map

Generates a Position Map.
Prefix Sum

Computes the prefix sum of a layer.
Premultiply

Premultiplies an RGBA layer.
Preview Material

Applies the preview material to geometry.
Project on Layer

Projects a layer onto a target layer.
Quantize

Quantizes input data into discrete steps.
RGB to RGBA

Converts RBG layers to RGBA.
RGB to UV

Splits an RGB layer into UV and Mono layers.
RGBA to RGB

Converts RBGBA layers to RGB.
RGBA to UV

Splits an RGBA layer into two UV layers.
ROP Image

Writes the output of a COP network to disk.
Ramp

Generates linear and radial ramps.
Random Mono

Creates a Mono layer with random values.
Random RGB

Creates a Mono layer with random values.
Rasterize Geometry

Rasterizes geometry onto a layer.
Rasterize Layer

Rasterizes a layer onto another layer’s camera.
Rasterize Setup

Prepares geometry for the Rasterize Geometry COP.
Remap

Remaps a layer.
Resample

Performs image scaling by changing the width, height and pixel sizes.
SDF Adjust

Modifies the values for a Mono SDF layer.
SDF Blend

Combines two Mono SDF layers.
SDF Shape

Builds a 2D signed distance field of a selected shape.
SDF to Mono

Converts an SDF field to a Mono image layer.
SDF to RGB

Converts an SDF field to an RGB color layer.
SOP Import

Imports SOP Geometry into Copernicus.
Segment by Connectivity

Segment a layer into connected components.
Segment by Value

Segment a Mono layer into bands of similar value.
Sequence Blend

Blends multiple image inputs by a blend factor.
Slap Comp Import

Import live layers from the Solaris Viewport.
Slope Direction

Converts a height layer into a direction layer.
Smooth Fill

Smoothly fills a region of a layer.
Stamp Points

Stamps layers from point positions.
Statistics

Outputs the average, minimum and maximum values of the input layer
Statistics by ID

Compute statistics for each ID island.
Streak Blur

Streaks an image, adding a motion blur effect.
Subnetwork

Used to organize a collection of COPs into one node.
Switch

Selects an input layer.
Switch If Wired

Selects an input based on what is connected.
Switch by Type

Selects an output layer by the type of the inputs.
Tile Pattern

Generates rectangular tiles for texture patterns.
Transform 2D

Transforms a layer in 2D.
Transform 3D

Transforms a layer in 3D.
UV Map

Generates a UV Map.
UV Map by ID

Creates a UV Map for each connected ID island.
UV Sample

Samples an input layer using a UV layer.
UV Transform

Transforms the values of a UV layer in 2d space.
UV to Polar

Converts Cartesian coordinate pixels to polar coordinate pixels.
UV to RGB

Joins an UV and Mono layer into an RGB layer.
UV to RGBA

Joins two UV layers into an RGBA layer.
Vector Transform

Transforms values of an RGB layer in 3d space.
Wipe

Performs a wipe transition between two images.
Worley Noise

Generates Worley noise.
Worley Noise 3D

Generates Worley noise from 3d locations.
Wrangle

Runs a VEX snippet to modify layer values.
Z Composite

Composites two layers by depth.