The type of noise to generate. Different algorithms give noise with different characteristics.

Fast

The default. A faster and more interesting variant of Perlin noise.

Frequency is scaled by 1.25.

Sparse Convolution

Sparse Convolution noise is similar to Worley noise. Does not have artifacts at grid points.

Frequency is scaled by 1.25.

Alligator

Produces a bumpy output. Named for its alleged resemblance to alligator skin.

Frequency is scaled by 1.64.

Perlin

A noise where the visual details are the same size. Wikipedia article

Perlin Flow

A noise that’s stable over time, like a rotated Perlin noise, useful to create noise that seems to swirl and flow smoothly across time. Use the Flow rotation parameter below to control the rotation.

Simplex

A noise similar to Perlin but the noise lattice is on a tetrahedral mesh rather than a grid. This can avoid the grid patterns often visible in Perlin noise.

Worley Cellular F1

Produces cellular features similar to plant cells, ocean waves, honeycombs, cratered landscapes, and so on. Wikipedia article

Worley Cellular F2-F1

A variant of Worley noise that produces blunted and cornered features.

Manhattan Cellular F1

A variant of Worley F1 noise that uses Manhattan distance calculation. Useful when you want unusual-looking noise.

Manhattan Cellular F2-F1

A variant of Worley F2-F1 noise that uses Manhattan distance calculation. Useful when you want unusual-looking noise.

Chebyshev Cellular F1

A variant of Worley F1 noise that uses Chebyshev distance calculation. Useful when you want unusual-looking noise.

Chebyshev Cellular F2-F1

A variant of Worley F2-F1 noise that uses Chebyshev distance calculation. Useful when you want unusual-looking noise.

Perlin Cloud

Generates perlin noise based cloud pattern influenced by the Distortion parameter.

Perlin noise with Distortion set to -1 (left) and +1 (right):

Simplex Cloud

Generates simplex noise based cloud pattern influenced by the Distortion parameter. Simplex noise similar to Perlin, but the noise lattice is on a tetrahedral mesh rather than a grid. This can avoid the grid patterns often visible in Perlin noise.

Simplex noise with Distortion set to -1 (left) and +1 (right):

Fast Simplex Cloud

Generates fast simplex noise based cloud pattern influenced by the Distortion parameter. This simplex noise function uses a different lattice structure and a cheaper accumulation method.

Simplex noise with Distortion set to -1 (left) and +1 (right):

Controls the effect of the distortion, large values will create larger wispy details in the pattern, but might create unrealistic looking cloud patterns.

Click the Per Component button for separate amplitudes along each axis.

Specifies which vector components will be changed by the amplitude.

When you turn on the Per Component button, this lets you scale the Amplitude separately across each axis.

Uniform scale of elements in the noise.

Click the Per Component button for separate scales along each axis.

When you turn on the Per Component button, this lets you scale the Element Size separately across each axis.

Offset within the evaluated noise field (added to each axis). If you have the general noise effect you want, but want to get a different set of values for a different look, try changing the offset.

You can animate the noise using an expression such as $T * 0.25 here. This is faster to compute than Animate Noise, but gives the visual effect of “panning” across the noise field, which may or may not be acceptable.

Click the Per Component button for separate additional offsets along each axis.

When you turn on the Per Component button, this lets you add the a separate offset along each axis.

Applies additional noise offset to the main noise to create finer details.

The type of noise to generate. Different algorithms give noise with different characteristics.

Fast

The default. A faster and more interesting variant of Perlin noise.

Frequency is scaled by 1.25.

Sparse Convolution

Sparse Convolution noise is similar to Worley noise. Does not have artifacts at grid points.

Frequency is scaled by 1.25.

Alligator

Produces a bumpy output. Named for its alleged resemblance to alligator skin.

Frequency is scaled by 1.64.

Perlin

A noise where the visual details are the same size. Wikipedia article

Perlin Flow

A noise that’s stable over time, like a rotated Perlin noise, useful to create noise that seems to swirl and flow smoothly across time. Use the Flow rotation parameter below to control the rotation.

Simplex

A noise similar to Perlin but the noise lattice is on a tetrahedral mesh rather than a grid. This can avoid the grid patterns often visible in Perlin noise.

Worley Cellular F1

Produces cellular features similar to plant cells, ocean waves, honeycombs, cratered landscapes, and so on. Wikipedia article

Worley Cellular F2-F1

A variant of Worley noise that produces blunted and cornered features.

Manhattan Cellular F1

A variant of Worley F1 noise that uses Manhattan distance calculation. Useful when you want unusual-looking noise.

Manhattan Cellular F2-F1

A variant of Worley F2-F1 noise that uses Manhattan distance calculation. Useful when you want unusual-looking noise.

Chebyshev Cellular F1

A variant of Worley F1 noise that uses Chebyshev distance calculation. Useful when you want unusual-looking noise.

Chebyshev Cellular F2-F1

A variant of Worley F2-F1 noise that uses Chebyshev distance calculation. Useful when you want unusual-looking noise.

Perlin Cloud

Generates perlin noise based cloud pattern influenced by the Distortion parameter.

Perlin noise with Distortion set to -1 (left) and +1 (right):

Simplex Cloud

Generates simplex noise based cloud pattern influenced by the Distortion parameter. Simplex noise similar to Perlin, but the noise lattice is on a tetrahedral mesh rather than a grid. This can avoid the grid patterns often visible in Perlin noise.

Simplex noise with Distortion set to -1 (left) and +1 (right):

Fast Simplex Cloud

Generates fast simplex noise based cloud pattern influenced by the Distortion parameter. This simplex noise function uses a different lattice structure and a cheaper accumulation method.

Simplex noise with Distortion set to -1 (left) and +1 (right):

Controls the effect of the advection. Large values will advect the noise more. This is a multiplier on the noise amplitude (given by Amplitude).

Click the Per Component button for separate amplitudes along each axis.

When you turn on the Per Component button, this lets you scale the Amplitude Scale separately across each axis.

Uniform scale of elements in the noise. This is a multiplier on the noise element size (given by Element Size).

Click the Per Component button for a separate element size scale along each axis.

When you turn on the Per Component button, this lets you scale the Element Size separately across each axis.

Offset within the evaluated advection noise field (added to each axis). If you have the general noise effect you want, but want to get a different set of values for a different look, try changing the offset.

Click the Per Component button for a separate offset along each axis.

When you turn on the Per Component button, this lets you add a separate offset along each axis.

The number of iterations of distortion to add to the output of the basic noise. The more iterations you add, the more “detailed” the output. Note that the output may have fewer octaves than this parameter (that is, increasing the parameter will eventually stop adding detail), because the node eventually stops when there’s no more room to add more detail in the output.

The scale increment between iterations of fractal noise added to the basic output. The higher the value the larger the “jaggies” added to the output. You can use a negative value for roughness.

When this is turned on, a directional force is added to the generated wispy noise to simulate the effect of a directional wind.

Controls the strength of the wind. Values that are too large could destroy the fine wispy details.

Controls the direction of the wind force.

When you apply wind to billowy clouds (created by Cloud Billowy Noise), this allows scaling the strength of the wind based on the signed distance field (provided in the second input of this node). Using this, the wispy details can be pulled more and more toward the wind direction the further away they are from the surface of the cloud.

Controls the surface distance at which the wind strength is at zero.

Controls the surface distance at which the wind strength is at its maximum.

Allows the Control Ramp to change how the surface distance should scale the wind strength between the minimum and maximum distance.

The ramp’s vertical axis represents the strength of the effect and the horizontal axis represents the surface distance between Distance Min and Distance Max.

The generated wispy noise field produces vectors that can flow in all directions. When working with a billowy cloud, you might not want vectors pointing inwards in the cloud volume. When a signed distance surface is provided as the second input, this controls how much each vector should point towards the surface normal instead based on the distance from the cloud surface.

Controls the surface distance at which the reflection strength is at zero.

Controls the surface distance at which the reflection strength is at its maximum.

Allows the Control Ramp to change how the surface distance should scale the reflection strength between the minimum and maximum distance.

The ramp’s vertical axis represents the strength of the effect and the horizontal axis represents the surface distance between Distance Min and Distance Max.

Scales the overall strength of the wispy noise based on the distance from the cloud surface when a signed distance field is provided in the second input.

Controls the surface distance at which the wispy strength is at zero.

Controls the surface distance at which the wispy strength is at its maximum.

Allows the Control Ramp to change how the surface distance should scale the wispy strength between the minimum and maximum distance.

The ramp’s vertical axis represents the strength of the effect and the horizontal axis represents the surface distance between Distance Min and Distance Max.

Scales the overall strength of the wispy noise based on the distance along a bound direction.

The direction in world space to use to scale the wispy noise strength.

Controls the bound limit along the bound direction (given by Bound Direction) at which the wispy strength is at zero.

Controls the bound limit along the bound direction (given by Bound Direction) at which the wispy strength is at its maximum.

Allows the Control Ramp to change how the bound distance should scale the wispy strength between Bound Min and Bound Max.

The ramp’s vertical axis represents the strength of the effect and the horizontal axis represents the bound distance between Bound Min and Bound Max.

The name of the volume to be used as density for generating the wispy noise. Usually you should leave it as density.

The name of the volume to be used as signed distance field for generating the wispy noise. Usually you should leave it as surface.

The name of the volume to be used as mask generating the wispy noise. Usually you should leave it as mask.