Fractal Noise
Updated: 4 Dec 2023
Apply fractal noise shading to a material.
Fractal Noise
Method #
This node applies fractal noise to the shading of a material node. This can be used to deform, recolour, and change the lighting on a mesh.
| Fractal Type | Output Modes | Texture Coordinate |
|---|---|---|
|
|
|
|
| A FBM fractal - B Turbulence - C Ridged Multi Fractal - D Marble | A Output channel normal - B Output channel RGBA - C Shader pass vertex - D OutPut channel position, Shader passe vertex | OutPut channel texture coordinate, Shader pass vertex |
The output of this node can be connected to other shading nodes, to build up a more complex shading system.
Parameters
These properties control the core behaviours of the node.
Parameter Details Mapping Type
How the generated shader is applied to the surface.
- World Position : The shader is generated in world space.
- Object Local Position : The shader is generated relative to the object.
- Texture Coordinate : The shader is generated in UV space, and mapped using the object’s UV’s.
Noise Type
Select the noise function to generate noise from.
- FBM : Generates cloudy noise using a Fractal Brownian Motion algorithm.
- Turbulence : Generates bumpy noise using a turbulence noise algorithm.
- Ridged Multifractal : Generates curvy looking noise from an inverse of the turbulence noise algorithm.
- Marble : Uses FBM noise to displce a sine wave pattern, creating a marbled pattern.
- Simplex 2D : Generates a smoother cloud noise using the simplex noise alorithm in 2D.
- Simplex 3D : Generates a smoother cloud noise using the simplex noise alorithm.
- Flow : Generates a liquidy noise by stretching and sqaushing different parts of an FBM generated noise.
- Warped 1 : Generates an oily noise by randomly displacing a simmpler noise pattern at a low octave value.
- Warped 2 : Generates an oily noise by randomly displacing warped noises at a medium octave.
Threshold
Shift the minimum value for the fractal noise gradient.
Ramp Power
Change how the gradient changes between the high and low values.
Noise Scale
Scale the size of any noise generated.
Offset Amount
For warping fractal noises, controls how much the fractal noise is offset by the warp.
Num Octaves
How many times the noise generation is iterated at different noise levels.
Preview In Viewport
Preview the effects of the shading node on the channel it’s applied, without other nodes further in the chain being used.
These properties control the 3D transforms of the node. Transforms will generally be inherited by child nodes, although they can be ignored through the Inherit Transform Channels attributes.
Parameter Details Position X
The shader’s position along the local x-axis.
Position Y
The shader’s position along the local y-axis.
Position Z
The shader’s position along the local z-axis.
Rotation Heading
The shader’s rotation around the local y-axis.
Rotation Pitch
The shader’s rotation around the local x-axis.
Rotation Bank
The shader’s rotation around the local z-axis.
Scale X
The shader’s scale along the local x-axis.
Scale Y
The shader’s scale along the local y-axis.
Scale Z
The shader’s scale along the local z-axis.
Control the inheritance of the transforms from the parent.
Parameter Details Position
Toggle inheritance of the Position from the parent.
Rotation
Toggle inheritance of the Rotation from the parent.
Scale
Toggle inheritance of the Scale from the parent.
World Position Only
Inherit the world position from the parent only, rotation and scale will be ignored. Overrides above properties.
Inherit Time
Toggle inheritance of time from the parent.
Inputs
These properties control the core behaviours of the node.
| Parameter | Details |
|---|---|
| Mapping Type |
How the generated shader is applied to the surface.
|
| Noise Type |
Select the noise function to generate noise from.
|
| Threshold | Shift the minimum value for the fractal noise gradient. |
| Ramp Power | Change how the gradient changes between the high and low values. |
| Noise Scale | Scale the size of any noise generated. |
| Offset Amount | For warping fractal noises, controls how much the fractal noise is offset by the warp. |
| Num Octaves | How many times the noise generation is iterated at different noise levels. |
| Preview In Viewport | Preview the effects of the shading node on the channel it’s applied, without other nodes further in the chain being used. |
These properties control the 3D transforms of the node. Transforms will generally be inherited by child nodes, although they can be ignored through the Inherit Transform Channels attributes.
| Parameter | Details |
|---|---|
| Position X | The shader’s position along the local x-axis. |
| Position Y | The shader’s position along the local y-axis. |
| Position Z | The shader’s position along the local z-axis. |
| Rotation Heading | The shader’s rotation around the local y-axis. |
| Rotation Pitch | The shader’s rotation around the local x-axis. |
| Rotation Bank | The shader’s rotation around the local z-axis. |
| Scale X | The shader’s scale along the local x-axis. |
| Scale Y | The shader’s scale along the local y-axis. |
| Scale Z | The shader’s scale along the local z-axis. |
Control the inheritance of the transforms from the parent.
| Parameter | Details |
|---|---|
| Position | Toggle inheritance of the Position from the parent. |
| Rotation | Toggle inheritance of the Rotation from the parent. |
| Scale | Toggle inheritance of the Scale from the parent. |
| World Position Only | Inherit the world position from the parent only, rotation and scale will be ignored. Overrides above properties. |
| Inherit Time | Toggle inheritance of time from the parent. |
| Name | Description | Typical Input |
|---|---|---|
| Transform Modifiers | Apply the transforms of another node to this node. | Null |
| Target Node | Modifiy the rotations of the node to always direct the z axis towards the input. | Null |
| Local Transform Override | Apply the transforms of another node to this node, relative to its parent. | Null |