Concept / Soft tonal gradation

Soft tonal gradation

A tonal treatment in which brightness changes gradually rather than abruptly

A tonal treatment in which brightness changes gradually rather than abruptly.

A phrase to start with

Makes brightness transitions gradual.

Appearance and effects

Brightness transitions gradually and volume appears gentle.

Visual traits

  • Gradual tone
  • Continuous volume
  • Gentle boundaries

Expected changes

  • Light-dark boundaries are less likely to be abrupt
  • Volume is more likely to appear continuous

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

Soft tonal gradation makes transitions from light to dark appear gradual. It does not determine a particular light source, time of day, hue, or blur.

In more detail

It avoids hard tonal steps so volume and atmosphere appear continuous. Color, contrast, and light direction remain separate choices.

Includes

  • Gradual tonal transition
  • Continuously visible volume

Excludes

  • Hard light-dark boundary
  • Particular lighting
  • Defocused image

What this does not imply

  • Low contrast
  • A particular color or light source
  • Blur

Variability

Overall contrast and light direction can be adjusted separately.

Usage and adjustments

Usage

  • Transition tone gradually
  • Specify light source separately

Distinguish similar expressions

  • Use smooth appearance when reducing surface roughness is intended

Typical uses

  • Make tonal changes in figures
  • objects
  • or landscapes appear gradual

Possible failure modes

  • Tonal difference is lost and becomes flat
  • Focus becomes blurred

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