Houdini 22.0 Nodes Copernicus nodes

Grunge Galvanized Steel Copernicus node

Generates a pattern resembling galvanized steel.

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Since 22.0

This node creates a pattern of layered noises that resemble galvanized steel. The Galvanized Steel parameters control the strength and direction of the base crystalline shapes (spangle), and the strength and roughness of additional spangle distortion. For example, configure the pattern so the steel has a large mottled texture with metallic luster and matte gray areas.

Use this node as a mask or a building block for more intricate textures. For example, use this node to create steel patterns on nails or roofs.

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. 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.

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.

Galvanized Steel

Distort Size

The overall scale of the distortion for the base layer. Higher values stretch and bend the crystalline shapes to create a ripple effect.

Distort Angle

The angle (in degrees) to rotate the distortion in the base layer.

Distort Scale

The strength of the distortion, in the direction of the Distort Angle, for the pixels in the base layer.

Secondary Distort Size

The size and strength of the distortion for the secondary layer on top of the base layer. Higher values zoom in on the distortion to soften the spangle, while lower values zoom out on the distortion to add more intricate spangle.

Secondary Distort Roughness

The roughness of the distortion for the secondary layer. Higher values result in rougher edges and more waves. Lower values result in smoother, more coherent edges and less waves.

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 galvanized steel pattern.

See also

Copernicus nodes