Pixel Chain
A pixel editor where SHA-256 decides your colors
What it does
Pixel Chain is a pixel-art editor with one rule: from the second cell on, a color is legal only if SHA-256 of everything you've painted plus that color ends in enough trailing zero bits. Level 1 needs 11, level 10 needs 20 — each level roughly halves what survives. Every stroke sweeps all 16,777,216 RGB values and hands you the nearest color the chain will accept. The seed is only width, height and level, so the same piece rebuilds the same chain on anyone's phone.
Download Pixel Chain by 丽莉 芮 on the App Store. See screenshots, ratings and reviews, user tips, and more apps like Pixel Chain.
Free · In‑App Purchases · Designed for iPad. Not verified for macOS. Graphics & Design Developer 丽莉 芮 Language EN + 17 More Size 2 MB iPhone, iPad Colors are not picked here. They are computed — and the chain decides what you may place next. Pixel Chain is a small-canvas pixel editor where you do not choose colors freely. You choose from what the chain allows. HOW IT WORKS Every pixel you place is appended to a chain. From the second pixel on, a color is legal only when the SHA-256 of every color placed so far, plus that candidate color, ends in a run of zero bits. The number of zero bits is the level you pick when you create the canvas. Your palette swatches almost never pass that test, so…from apps.apple.com
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