[arudaev]

Stack: 7 of 11 (playtest): base #222. Merge bottom-up, only on Alexander's word.

What and why

Alexander (25 Oct): "test all your results, and each layer, in debugging mode, and against purple, then white background". Purple shows light holes and specks; white shows what purple hides, such as dark specks, dark fringes and shadows.

• Debug → Show → "… white instead" paints the backdrop white (backdropColour in core/debug.ts). The screenshot line says backdrop-white.
• docs/09 records the rule: every new sprite and layer is checked over purple, then white, offline with backdrop_check.py ([4/11] feat(stage): platforms in Jenny's arena #215) and in the game with each layer shown alone. It also covers despeckle, and plates cut from soft sources must have their pinholes filled.
• docs/02 names the switch.

Issue

Refs #72

Verification

• npm test: 336 passed (new: the backdrop colour, the screenshot line); tsc clean; check_docs clean.
• In the browser (dev server): Jenny's arena in debug mode, each of its six layers shown alone and all together, over purple and over white: 14 snapshots saved through the dev server's capture route.
• Found that way: the platform beams cut from the maze plate read flat and had no reason to be there (Alexander). They are being redrawn as girders hanging from the overhead beam (next commit on [4/11] feat(stage): platforms in Jenny's arena #215).

Replaces #218: the same commits replayed on the current base, so the stack merges cleanly without a force-push (the old branch conflicted after fixes were carried up the stack).

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated
wincs	Ready	Preview	Oct 25, 2026 11:58am UTC