Lumina v1.0.0

Lumina 1.0.0

A fast, dependency-light image editor with a PSD engine written from scratch —
layered PSD read/write, native Curves/Levels, vector masks, layer effects and ICC
colour management. No native modules, no cloud, no telemetry.

Downloads

Platform	File	How to run
macOS (Apple Silicon)	Lumina-1.0.0-mac-arm64.dmg	open the DMG, drag to Applications; first launch: right-click → Open (unsigned build)
macOS (Intel)	Lumina-1.0.0-mac-x64.dmg	same
Linux (any distro)	Lumina-1.0.0-linux-x86_64.AppImage	chmod +x then run — nothing to install
Linux (Debian/Ubuntu)	Lumina-1.0.0-linux-amd64.deb	sudo apt install ./Lumina-1.0.0-linux-amd64.deb
Linux (portable)	Lumina-1.0.0-linux-x64.tar.gz	unpack and run ./lumina
Windows	Lumina-Setup-1.0.0-win-x64.exe (installer) or Lumina-1.0.0-win-x64-portable.exe	run; SmartScreen → More info → Run anyway

Step-by-step instructions, system libraries per distribution, self-signing and
source builds: docs/INSTALL.md.

What's in this release

• PSD engine — reads 8/16/32-bit RGB, CMYK and Grayscale documents (flat and
  layered, RAW/RLE/ZIP/ZIP+prediction, nested compositions, clipping and global
  masks, lfx2, vmsk, Crv and other typed blocks) and writes layered PSDs
  Photoshop opens, with optional ZIP compression and CMYK output.
• Adjustment layers — Curves, Levels, Brightness/Contrast, Invert, Posterize,
  Exposure, Hue/Saturation, Threshold, Vibrance; non-destructive with live sliders.
• Editor — 27 blend modes in linear space, groups, clipping and layer masks,
  editable text layers, history panel, navigator, selection/lasso/magic-wand,
  brush, clone, gradient, shape and a stack of photographic effects.
• Colour — standards-compliant sRGB ICC profile (D50 + Bradford chad +
  parametric curve); verified within 1 level of LCMS.
• Formats — PNG, JPEG, TIFF, BMP, QOI (byte-exact C interop), WebP/GIF/DNG on
  read; PSD/PSB on read and write.
• Two apps, one engine — npm run web for the browser, Electron shell for the
  desktop (macOS, Linux, Windows) over a sandboxed app:// scheme.

Verification (reproduce it yourself)

Check	Result
30 real Photoshop documents vs. psd-tools raw planes	30 / 30 match — 0 differing pixels
Layered PSD round-trip (RLE / ZIP+prediction / CMYK), composited by psd-tools	0 / 455,400 pixels differ
Per-layer channel planes vs. encoder input	identical
Automated tests (npm test)	269 passing (incl. 25 in a real headless browser)
ICC identity transform vs. LCMS (50k random colours)	max 1 level, mean 0.0014

npm test
npm run verify:psd
npm run verify:corpus:download

Method, evidence and the honest list of remaining limitations:
docs/VERIFICATION.md.

Notes

• Builds are not code-signed (no paid developer certificates): macOS needs a
  one-time right-click → Open, Windows shows a SmartScreen prompt.
• Known limitations: Lab/Duotone/Multichannel are not decoded, Smart Objects are
  flattened, embedded CMYK ICC profiles are ignored on import, and 32-bit files
  open but save at 8/16-bit.
• Full history: CHANGELOG.md.

MIT licensed. Adobe and Photoshop are trademarks of Adobe Inc.; Lumina is an
independent project and is not affiliated with Adobe.