Perlin Noise

Gradient noise, stacked into fractals and folded through itself.

patterns.perlin · v1 · renderer canvas

Clouds · 5 octaves · zoom 3.0 · 7 colours

[data-canvas-stage] { display: none; }

Drawn in the browser

This generator does not send you an image. The server sends a short description of one — the parameters below, plus a 32-byte key — and the drawing is done here, from the same byte stream the server would have used. That needs JavaScript, so with it switched off there is nothing to show.

The description itself is still public: /api/v1/g/patterns.perlin returns it, and the maths is in resources/js.

Clouds · 5 octaves · zoom 3.0 · 7 colours

entropy in

16 bytes

stream used

42 bytes

rejections

duration

240 µs

palette

amplitude sum

1.94

effective frequency

Seed receipt

Class A · Cryptographic

Atmospheric radio noise, sampled in Dublin moments ago.

source: RANDOM.ORG
observed: 2026-09-13T18:44:14+00:00
latency: 308ms
mixed with: csprng — always

https://www.random.org/randomness/ ↗

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The token is the seed, so this link recomputes the result rather than looking it up. No database, and it works for as long as v1 does.

Controls · from schema()

Width

200 2048

Height

200 2048

Zoom

0.5 16

How many noise cells fit across the canvas.

Detail (octaves)

1 9

One octave is plain Perlin. Each one adds finer detail at half the strength.

Roughness

0.2 0.85

How much each finer octave contributes.

Frequency step

1.4 3.2

Shape

Domain warp

0 1.2

Folds the noise through a copy of itself. The single most dramatic control here.

Colour

Palette size

2 12

Banding

Quantise into flat bands instead of a smooth gradient.

Entropy source

Picking a source changes the story on the receipt, never the quality: anything below class A is mixed with the OS CSPRNG before it reaches you. This result actually came from RANDOM.ORG.

seed token 1P741M8X3QBCJH2FKRMWWJWBF4

Re-render keeps this token. Generate replaces it. That is the whole idea.

Burned into the corner before the file is written, so the image keeps its provenance wherever it ends up:

This page and /api/v1/g/patterns.perlin run the same code. There is no private endpoint.

Perlin Noise

Result

Measurements

Seed receipt

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