75550256ef7c882c2e4f04d1fc9490c4a8da3ba4
Measured first: 45% of FI tiles are all-air, yet FloatingIslandFieldV1 returned unknown for any box near an island AABB (25,536 unknown boxes, 0 tile skips). Conservative ranges for island bodies, root lobes, buttresses, connectors, surface detail and smooth-min budgets now let the shared box classifier prove FI air/solid (216 tile skips; 28.6 M audited samples, 0 violations). The X8 path reuses its FI preflight samples. LOD7-8 far-shell and column work is skipped outside per-tile island/connector influence bounds (farHorizonVersion 4 -> 5). FI 16.74 -> 7.36 s (-56%), FI moving entering-tile p50 halved; SW unchanged. Peer determinism (Clang/GCC W1/W8/W12, random cameras) PASS; fast/medium/full PASS. Research R20: world-type catalogue and dreamcore/liminal concepts (revised after a deepening pass). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_016dhxM43dnWvUu2B5Ph1iG1
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