Flowlines Fill

Flowlines builds a direction field from the underlying curves (a map that stores the local line angle across the image), then traces a dense set of field-guided isolines to cover the area with continuous, “flowing” strokes.

The result can resemble woodgrain, fluid motion, or topographic linework—lines that naturally wrap around forms instead of following a fixed global angle. Because the field is just an angle per point, you can rotate or invert it to generate counter-flow and clean cross-hatching (e.g., +45°, −45°, or any custom direction) while keeping the same underlying structure.

Enable and Customize a Flowlines Fill

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To enable the Flowlines mode for Handmade fill:

  1. Select Handmade as the fill type.

  2. Open the HANDMADE FILL tab.

  3. Click the Flowlines button.

Fill Parameters

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Interval Interval (units): Defines the spacing between flowlines. Lower values place the lines closer together, while higher values increase the distance between them.

Randomization Randomization (%): Adds controlled randomness to the spacing of the flowlines, creating a more organic and natural-looking result.

Smoothness Smoothness: Adjusts how smoothly the flowlines follow their paths, reducing sharp transitions and producing cleaner, more fluid curves.

Angle icon Angle (°): Sets the overall direction of the flowlines. Modify the angle to align them with the image structure or the desired visual flow.

stroke-push Push strength(%): Controls how strongly strokes push through dense hatching, allowing them to extend deeper between nearby strokes.

Interval

  1. Find the Interval Interval parameter.
  2. Adjust the value using the slider or enter it manually.

Smaller intervals produce denser, darker flowlines with more detail, whereas larger intervals create a lighter appearance with reduced detail.

 

interval: 1 interval: 1.5 interval: 2
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Adjusting Randomization

  1. Locate the Randomization Randomization icon setting.
  2. Use the slider or enter a percentage value to introduce variation in stroke spacing.
randomization: 10% randomization: 50% randomization: 100%
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Smoothness

  1. Find the Smoothness Smoothness option.
  2. Adjust the value using the slider or by entering a number manually.
  3. Higher values produce smoother transitions between the fill strokes.

Adjusting Angle

  1. Find the Angle Angle icon setting.
  2. Use the circular dial control or enter a specific angle in degrees.
angle: 0° angle: 90° angle: -45°
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Setting the Push Strength

  1. Find the Push Strength stroke-push parameter.
  2. Adjust the value using the control or enter a value manually.

Higher Push Strength lets strokes go farther between nearby strokes. Lower values make strokes stop sooner when they meet other lines, creating a denser and more controlled result.

push strength: 0% push strength: 50% push strength: 100%
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