Bounded smooth blends at junctions (3.1% of cells), QEF dual contouring on the exact crossings and
analytic normals, band-limited surface relief (bound 0.60 m, observed 0.40-0.44 m, R toggles it),
sparser strata. Exact signs vs the blended reference at every node, thin features kept, same hash
across worker counts. Mesh has 0 boundary edges but 3-7 overused edge groups: not collision-ready.
Near CPU total, 6 workers: 241 -> 836 ms. The new stages all run on ONE thread: blend index 186 ms,
blend evaluation 201 ms, dual contouring 322 ms, relief 61 ms.
Look: slab stack gone, joins rounder; chambers read as broad crumpled facets, junction seams still
flaky. Viewer built as interval_viewer2.exe (the owner had the first one open).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MmSoF64BbRFmk9C3p1VsBJ
