Houdini 22.0 Nodes Copernicus nodes

Turing Patterns Copernicus node

Applies a filter to create Turing patterns.

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Since 22.0

This node creates Turing patterns from the input. The node first applies a blur and then a sharpen over multiple iterations. This produces natural patterns of stripes and spots that follow the form of the original input.

Use this node to create organic patterns similar to Reaction-Diffusion, but without the need for a complex simulation.

Parameters

Signature

The layer type that the source accepts.

See Signatures for more information.

Mask

The amount of the new value to mix in with the original value. Higher values mix in more of the new value. Lower values mix in less of the new value. You can also set the RGBA channels to which you apply the effects of this node.

The default value is 1, which means this node uses only the new value. See Mask for more information.

Toggle RGB

Turns the Red, Green, and Blue channels on and off.

Red

Applies this node’s effects to the Red channel.

Green

Applies this node’s effects to the Green channel.

Blue

Applies this node’s effects to the Blue channel.

Alpha

Applies this node’s effects to the Alpha channel.

Filter

The filter to blur the image with. See Filters for more information.

Box

Creates a box around the pixel of which to take an average of.

Gaussian (default)

Take a weighted average of the pixels according to a Gaussian distribution.

Read Pixels outside Image

Adds contributions from pixels outside of the image. This depends on the border type, which determines what pixels to read as outside of the image.

Units

Sets the units used for the parameters.

Image

Sets the radius to use units of the image space.

Pixels

Sets the radius to use units of the number of pixels.

Iterations

The amount of times to blur and sharpen the image.

Radius

The size of the blur effect’s radius in image space or pixels.

Power

The amplitude of the sharpening. This is the brightness done between each iteration. Higher values expand and solidify the pattern.

Gain

The amount by which to multiply the brightness of the original layer’s pixels.

Scale

Scales the blur radius for a specific axis.

Inputs

source

The original layer or VDB to which you apply the Turing pattern filter.

radius

An optional per-pixel layer or VDB that’s scaled by the Blur parameter.

mask

An optional per-pixel mask amount that’s scaled by the Mask parameter.

Outputs

pattern

The source layer or VDB with the Turing patterns filter applied.

See also

Copernicus nodes