Houdini 22.0 Nodes Copernicus nodes

Grunge Bark Strips Copernicus node

Generates a pattern resembling bark strips.

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Since 22.0

This node creates a pattern of layered noises that resemble bark strips. The Bark Strips parameters control the size and edge wear of the base bark strips, and the size of additional cuts and swirls on top of the base pattern. These parameters let you create rough tree surfaces. For example, configure the pattern so the bark has grooves, knots, and sharp, ragged edges.

Use this node as a mask or a building block for more intricate textures. For example, use this node to create oak tree bark.

Parameters

Range

Amplitude

The amount by which to multiply the pixel value (originally in the 0 to 1 range). The node applies this before the Center adjustment.

Values in the generated layer cover the range from C-A to C+A, where C is Center and A is Amplitude.

Note

Layers can store negative numbers and values above 1, so this may result in out-of-bounds values. Use Post Processing options to clamp the output.

Center

The center of the output pixel values, applied as an offset.

Values in the generated layer cover the range from C-A to C+A, where C is Center and A is Amplitude.

Note

Layers can store negative numbers and values above 1, so this may result in out-of-bounds values. Use Post Processing options to clamp the output.

Mask Contrast

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

Pattern

Element Size

The size (in image coordinates) of the basic element of the generated pattern.

Offset

The amount to offset the entire pattern in image coordinates.

Tile Size

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

Bark Strips

Strips Inflate

The width of the strips. Higher values expand the width of the strips to increase bulges, while lower values contract the width of the strips inwards.

Primary Edge Breakup

The amount of horizontal distortion and edge wear to apply to the strips. Higher values add and increase the severity of jagged edges along the strips.

Secondary Mask

The visibility of the secondary layer (horizontal lines) on top of the base bark layer. Higher values darken and expand the lines to add cuts and grooves on the bark. Lower values fade and compress the lines until they disappear.

Secondary Size

The size (in image coordinates) of the secondary layer on top of the base bark layer. Higher values zoom in on the lines so each line covers more of the pattern, which decreases the overall amount of cuts. Lower values zoom out on the lines so each line covers less of the pattern, which increases the overall amount of cuts.

Tertiary Mask

The visibility of the tertiary layer (elongated vertical cells) on top of the base bark layer. Higher values darken and expand the cells to add swirls on the bark. Lower values fade and compress the cells until they disappear.

Tertiary Size

The size (in image coordinates) of the tertiary layer on top of the base bark layer. Higher values zoom in on the cells so each cell covers more of the pattern, which decreases the overall amount of swirls. Lower values zoom out on the cells so each cell covers less of the pattern, which increases the overall amount of swirls.

Seed

The seed value that randomizes the values used in the generator. Changing this value results in a different output, but retains the same concept and look.

Post Processing

Note

The node applies the post-processing operations in the order they're listed.

Fold

Sets the noise values to the absolute value. For example, a pixel value of -2 becomes 2.

Note

This parameter doesn’t impact the output when there’s only positive values.

Complement

Sets the pixel value x to 1 - x.

Note

This method works for values in the 0 to 1 range. For images outside of this range, using Complement results in negative or out of range values.

Bias

The amount to pull the medium grey values (around 0.5) towards zero (if Bias is less than 1) or one (if Bias is greater than 1). A bias value of 0.5 doesn’t affect the values.

Gain

The amount to pull the medium grey values (around 0.5) together, while values around 0 and 1 are pulled apart. A gain value of 0.5 doesn’t affect the noise values.

Gamma

The overall gamma of the generated noise. Values greater than 1 increase the range of values in originally bright areas, which darkens the noise. Values less than 1 stretch out the range of values for originally dark areas, which increases the overall brightness of the noise.

Contrast

The amount to expand or shrink the overall range of tonal values. Each noise value is pushed towards (if Contrast is less than 1) or away from (if Contrast is greater than 1) medium grey values (around 0.5).

Note

This is not the same as Noise Contrast, which appears in some noise nodes and applies contrast during the noise function.

Clamp Minimum

Clamps values below the specified threshold.

Clamp Maximum

Clamps values exceeding the specified threshold.

Inputs

size_ref

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

Outputs

grunge

The generated bark strips pattern.

See also

Copernicus nodes