With the day/night background the plan went blurry after zooming from 100 %
(sharp when the page was opened at 800 %) and navigating a strongly zoomed
plan flashed the page white. Both came from #582's composition, not from the
wall hatch that #685 replaced:
- `.stage.daycycle.hp-safe-daycycle-outline .plan-svg` promoted the scene
with `will-change: transform`; Chromium freezes the raster scale of such a
layer, so the 100 % raster was shown stretched. The explicit layer #582
needs is now `will-change: opacity` (re-rasters at the current scale).
- The filtered outline had `overflow: visible` and a gesture exposed every
scene (#544) without bound, so the promoted layers grew with zoom squared
(CDP LayerTree, ~460 %: plan-svg 15.9x, outline 13.2x the stage; 39x after
navigating at 800 %). The full card clips its outline to its box and marks
it data-hp-live-overflow="clip" (never exposed); the live viewport bounds
every other exposure with an inline clip-path: inset(-25%) that leaves
with it, so idle DOM stays byte-identical (#531).
Owner-verified in Chrome 152 (built-in browser, DPR 2): sharp after 100 ->
800 %, no white flashes after reloading at 800 %.
Owner decision: #685's analytic gradient is reverted (13af1d5e), the single
<pattern> is back at every zoom; its close-up golden scenes stay and check
the pattern, its terminal-frame smoke checks the pattern.
Witnesses: demo/smoke_daycycle_zoom_layers.mjs (800 % x DPR 2: layers vs
stage, the hint, reload path, button/wheel/pinch); #582/#532 smokes now pin
the opacity hint; test/live-viewport.test.mjs (bounded exposure, clipped
scene); test/daycycle-layers.test.mjs (cascade). Four Node-guarded mutants.
Issue: #689
User-Visible: yes
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018qZfe7YS4rqEMKoVeS3GKd
Claude