Effects / Dither

Two-Row Sierra Dither

Two-Row Sierra is a balanced variant of the Sierra family that offers a good compromise between the quality of full Sierra and the speed of Sierra Lite. It diffuses error across two rows for smoother gradients with moderate processing cost.

dither-two-row-sierraPro

Effect ID: dither-two-row-sierra

Example Configuration

two-row-sierra.json

{
  "effectId": "dither-two-row-sierra",
  "dither": {
    "pattern": "twoRowSierra",
    "pixelation": 4,
    "paletteId": "monochrome",
    "colors": ["#000000", "#ffffff"],
    "brightness": 1,
    "contrast": 1,
    "threshold": 0.5
  }
}

Error Diffusion Matrix

Two-Row Sierra spreads error across 7 neighboring pixels:

        *   4   3      (row 0: current row)
  1   2   3   2   1      (row 1: next row)

  Divisor: 16

Characteristics

Balanced quality - Smoother than Sierra Lite
Moderate speed - Faster than full Sierra
Two-row spread - Good error distribution
Versatile - Works well for most images

Best Use Cases

General purpose - Good default choice
Mixed content - Handles photos and graphics well
Video - Fast enough for real-time with good quality
Print - Suitable for medium-resolution output

Tips

Great all-around choice when unsure which Sierra to use
Works well with both color and monochrome output
Use higher dither strength for more textured look
Combine with grain for vintage film aesthetic