solid_noise_plugin/README.md

Solid Noise Generator — Krita Plugin

A Krita plugin that generates solid Perlin noise at your canvas resolution. Supports configurable octave detail, scale, seed, and invert. Output is always contrast-stretched so the darkest pixel is pure black and the brightest is pure white.

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Installation

1. In Krita, go to Tools → Scripts → Import Python Plugin from File…
2. Select solid_noise_plugin.zip
3. Restart Krita
4. Go to Settings → Configure Krita → Python Plugin Manager, check Solid Noise Generator, click OK
5. Restart Krita again
6. Open the docker via Settings → Dockers → Solid Noise Generator

Manual install: If you prefer, extract the zip and copy solid_noise.desktop and the solid_noise/ folder into your Krita pykrita directory:

• Linux/macOS: ~/.local/share/krita/pykrita/
• Windows: %APPDATA%\krita\pykrita\

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Controls

Control	Description
Octaves (1–16)	Number of noise layers stacked together. 1 is smooth and cloud-like; 16 is highly detailed. Each octave doubles the frequency and halves the amplitude.
Scale	Zoom level of the noise pattern. Higher values show more features across the canvas.
Seed	Determines the random pattern. Same seed always produces the same result. Hit Random for a new one.
Invert	Flips light and dark values.
Generate on new layer	When checked, noise is painted onto a new layer so your existing content is untouched.

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How it works

Perlin noise is computed using fractal Brownian motion (fBm): multiple octaves of noise are summed, each at double the frequency and half the amplitude of the last:

value = Σ  0.5^i × perlin(x × 2^i, y × 2^i)
         i=0..octaves-1

After all octaves are accumulated, the result is contrast-stretched so the minimum value maps to pure black (0) and the maximum to pure white (255), guaranteeing full tonal range regardless of settings.