All effects and presets

Effect

Dither

Reduce colour depth with ordered or palette dithering for print and game looks.

When a medium can only print or display a few colours, dithering scatters those colours so the eye blends them into intermediate tones. Ordered patterns such as Bryce Bayer's 1973 threshold matrix tile a fixed screen across the image. Error-diffusion methods such as Floyd and Steinberg's 1976 algorithm push leftover error into neighbouring pixels for a softer grain.

Game consoles, early Mac paint programs and newspaper presses all leaned on dither. It is both a technical necessity and a graphic style.

Dither example
Example

Properties

  • Pattern

    Range
    Random, Bayer 16x16, XOR, ADD, Bayer 2x2, Bayer 4x4, Bayer 8x8, Hatch H, Hatch V, Hatch R, Hatch L, Crosshatch H, Crosshatch V, Zigzag H 4x4, Zigzag V 4x4, Zigzag H 8x8, Zigzag V 8x8, Checkerboard, Fishnet, Dot 4x4, Dot 8x8, Halftone, Square 4x4
    Default
    Random

  • Color Palette

    Range
    Adaptive, Rise, Spectrum, Regal, Nebula, Tide, Umber, Voltage, Noir, Bramble, Prism, Wash, Solar
    Default
    Adaptive

  • Color Count

    Number of Colors

    Range
    2 to 18
    Default
    18

  • Distance

    Range
    RGB, Luma, OKLab
    Default
    OKLab

  • Dither Strength

    Dither Strength

    Range
    0 to 2
    Default
    1.901

  • Gamma

    Gamma Correction

    Range
    0.5 to 5
    Default
    1.587

  • Pixel size

    Pixelation Step (Log2)

    Range
    1 to 4
    Default
    2

Command line

Requires Rethings Pro. Install the tool from Rethings → Install Command Line Tool… 

rethings apply --effect dither --set pattern_type=0 --set palette_type=0 -i input.jpg -o output.png

Gallery

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