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docs: file #113 - phantom exterior staircase on A9B3 building (unclickable => shell/cell geometry); suspect misplaced interior cell unifying #112-gap + collision symptoms

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Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Erik 2026-06-10 15:24:53 +02:00
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@ -3765,6 +3765,43 @@ Scan data: standing-now → [0x103]; flip-a → []; flip-b → [0x100].
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## #113 — Phantom exterior staircase on an A9B3 building (not in retail); suspect misplaced interior cell
**Status:** OPEN
**Severity:** MEDIUM (visual fidelity; suspect shares a root with the same
building's containment gap #112 and collision gaps #99)
**Filed:** 2026-06-10 (late — user side-by-side vs retail)
**Component:** render / building cells (or dat interpretation)
**Symptom:** an A9B3 building (near the #112 hill cottage; NPCs Aun Kielerea +
The Sentry nearby, spot ~(183, −111, 116) world) shows a stone-and-wood
STAIRCASE attached to its exterior wall in acdream; the retail client shows a
plain wall with a window there (user screenshots, 2026-06-10). The stairs are
NOT pickable (clicks select only NPCs behind them) ⇒ not a stab/WorldEntity —
building-shell or interior-cell geometry.
**Hypothesis (would unify three symptoms at this building):** a misplaced
interior EnvCell — an indoor staircase cell whose world transform puts its
geometry outside the shell. That would simultaneously explain (a) the phantom
exterior stairs, (b) the interior containment gap (#112's dead zone = a cell
volume sitting in the wrong place), and (c) missing collision on objects in
the house.
**Next steps:** (1) ACViewer oracle — open the same landblock; stairs present
there ⇒ shared dat-interpretation, absent ⇒ our transform/draw
(feedback_acviewer_as_oracle). (2) Offline: dump A9B3's LandBlockInfo
buildings + per-cell Position.Origin/rotation; look for a cell whose
transformed AABB escapes the building footprint. (3) Identify the building id
(the landblock's building list near the spot).
**Meta (user, 2026-06-10):** "we should not have to verify all houses like
this" — agreed; the open systemic debts are A6.P4 per-cell shadows (#99,
fixes collision everywhere), the #112 residual oracle read, and this transform
check. If (2) finds a systematic per-building transform error, ONE fix covers
every affected house.
---
# Recently closed # Recently closed
## #111 — ACE-mutated indoor restores: transparent interior / wrong placement at login — [DONE 2026-06-10 · 5f1eb7c + 5706e0e + 2735695] ## #111 — ACE-mutated indoor restores: transparent interior / wrong placement at login — [DONE 2026-06-10 · 5f1eb7c + 5706e0e + 2735695]