Concept / Thin line

Thin line

A line with a narrow width for outlines or marks

A narrow line that makes outlines or marks.

A phrase to start with

Narrows lines and contours.

Appearance and effects

Fine strokes create light contours and detail.

Visual traits

  • narrow line weight
  • delicate contour

Expected changes

  • Detail is more likely to remain visible
  • Contours are more likely to feel light

Five examples

1 — Medium-sized dog
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2 — Cat
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3 — Teenage boy
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4 — Unoccupied interior
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5 — Valley with a river and mountain ranges
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Meaning and scope

Definition

A thin line narrows an outline or drawn mark, revealing delicate boundaries or detail. Line direction, form, material, lighting, and damage remain separate choices.

In more detail

It adjusts weight only; it does not decide curvature, surface texture, lighting, or volume.

Includes

  • narrow outlines or drawn lines

Excludes

  • thick lines
  • line direction
  • material
  • lighting
  • or damage

What this does not imply

  • Straight or curved direction
  • a particular form
  • material
  • lighting
  • or damage

Variability

Systems vary in their interpretation of line weight, so naming the target contour as well can improve consistency.

Usage and adjustments

Usage

  • Specify line weight only

Distinguish similar expressions

  • Specify curvature and material separately

Typical uses

  • Preserve delicate contours and detail

Possible failure modes

  • Lines render broad
  • Lines disappear into the background

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