Audited katoomba_real on E's real roads (schema v2, 484 OSM ways -> 799-edge/872-node graph, 126 real
intersections, edges 3.5m-1303m incl 28 short <12m, ~4x5km span). E's roads landed mid-audit; verified
fresh Chromium, cache-busted. Docs-only (no code change: streetscape is road-agnostic).
VERDICT: Lane B streetscape is ROAD-AGNOSTIC — boots real Katoomba 0-error, every B system builds and
renders on the irregular graph (ground, furniture 39 chunks/148 trees, town-wide pools, tram, chunk
streaming, buildings, wind). Real main street reads well (road+footpath+lamps+working gig poster+citizens).
Like C's interiors, needed no code change to eat real geometry.
FINDING -> F (gate-blocking, PROVEN one-line fix): the BIG_CITY adaptive heuristic misfires on real roads.
index.html BIG_CITY = plan.shops.length>120 -> Katoomba has 20 shops(<120) but 799 edges/5km, so it stays
small-town mode (radius 3 + shadows ON), streams 50-52 chunks -> busiest venue block ~280k tris (clean,
settled) = BREACHES 200k gate (draws 150 <300). Proven fix: ?r=2&shadows=0 (BIG_CITY mode) -> 84k day /
104k night, 20 chunks, 72 draws, well under. Recommend: BIG_CITY = shops>120 || edges>200 (catches
Katoomba's 799, leaves synthetic Boolarra's 22). B's R3 adaptive-streaming concept, edge-count not shop-count.
Tram (Fable's flagged spine risk): degrades gracefully, no crash. spinePolyline runs one main chain =
3527m/49 edges = 21% of 232 mains (longest walkable chain). Arbitrary-but-functional for alpha; smarter
route or hard fence = beta (no plan.mode marker exposed to fence off; didn't add untested fencing).
Furniture/pools scale: town-wide pools ~4989 instances = still ~1 draw; 28 short edges get 0 lamps
(graceful). Correction: the disconnected graph I first saw was a synthetic-fixture DP artifact (junction
vertices dropped on near-collinear ways) — real Katoomba forms 126 intersections correctly; flagged to A.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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