[arudaev]

What and why

Rusty Creek's 01-distance (scroll 0.2), 06-near-rails (1.1) and 07-foliage (1.15) were drawn per chunk. In the game each layer sits at its chunk's origin and moves at its scroll. The 0.2 sky of the next chunk then slides over this one's with a hard vertical edge, and the foreground copies drift apart, leaving holes. Each is now one region-wide plate, quilted with depth_layers.py region (the method from #148). Shared plates ("= left") resolve through media-sources.json. The plates are cut into 2160 px tiles, tile j carried by chunk j, so lane B's loader needs no change. export_stage.py --verify still rebuilds all six chunk states exactly at rest from their own plates.

Comparison (AGENTS.md rule 4)

parallax.png shows the anomaly creek at camera x = 0, 1500, 3000, 4400 and 5200, as the game draws it. The sky and trees run through with no edges; rails and foliage have no gaps.

How to test

python scripts/compare.py parallax art/stages/rusty-creek --state clean --at 0 1000 2000 3000 4000 5200 --out tmp/rc.png
python scripts/export_stage.py art/stages/rusty-creek --out tmp/stages --verify

In the game, once lane B's loader is in: walk through ?region=rusty-creek and watch the sky across the chunk borders at x = 2160 and 4320.

Issue

Closes #150

Stack

• this PR [3/3] art: draw Rusty Creek's parallax layers from region-wide plates ← this PR
• [2/3] art: grow the Hidden Garden into a five-chunk prologue walk #148 [2/3] art: grow the Hidden Garden into a five-chunk prologue walk
• [1/3] art: give the Hidden Garden parallax layers from a depth key #143 [1/3] art: give the Hidden Garden parallax layers from a depth key

Verification

• export_stage.py --verify: rc-0-0 to rc-2-0, both states, exact at rest
• script tests and check_docs.py

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Project	Deployment	Actions	Updated
wincs	Ready	Preview	Oct 24, 2026 12:39am UTC