Verdict: shipped, not killed. The R7 park reason ("touches shared materials") is a non-blocker under
R16's measurement-over-brief standard: the gum-tree billboard material is B-owned (furniture.js), so
this is entirely Lane B -- no C/E material seam. Verified fresh Chromium seed 20261990.
- New web/js/world/wind.js: shared uniforms (uWindTime/uWindAmp) + applyWind(material) (onBeforeCompile
vertex patch: top-weighted horizontal sway, per-instance world-position phase, USE_INSTANCING-guarded)
+ updateWind(dt,intensity). furniture.js applies it to the tree material; weather.js drives it from
update(dt) (base breeze 0.05 clear -> 0.05+intensity*0.30 ~0.35 rain gusts).
- Trees only. Awnings excluded by MEASUREMENT: rigid posted-verandah box slabs don't flutter (fabric
canopy ripple = separate v3.3, shares the rigid awning InstancedMesh today).
- Byte-identical when weather off (the covenant): updateWind runs only inside weather.update, and the
weather system isn't constructed under ?weather=0 / ?classic=1 -> uWindAmp stays 0 -> sin(...)*0.0==0.0
-> identical vertices. Proven: amp=0 two times = 0/180000 px differ; ?weather=0 boot = 0 tree-motion px;
?classic=1 = amp 0, trees render, 0 errors. No plan/fetch/rng change -> F's classic gate untouched.
- Sway works: rain amp 0.305 moves ~14100/180000 region px over 0.8s (exaggerated 2.5 -> 101k); trees
render clean, no glitch. ~0 draws (ALU ops in the existing tree InstancedMesh vertex program), 0 errors.
-> Lane F (B->F handshake): SWAY SHIPPED. In old frames under the default boot; ?classic=1/?weather=0
sway-free + byte-identical. Procedural (no asset -> E has nothing to do).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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