diff --git a/docs/research/2026-09-01-overhaul/s3-walk-ownership-map.md b/docs/research/2026-09-01-overhaul/s3-walk-ownership-map.md
index 0c462597..cc2559f3 100644
--- a/docs/research/2026-09-01-overhaul/s3-walk-ownership-map.md
+++ b/docs/research/2026-09-01-overhaul/s3-walk-ownership-map.md
@@ -849,6 +849,49 @@ worktree on top of `079483bb6`; round 1 of the two the plan allows.
   bespoke Facts (doorway-still, foundry-deep) — they need the full
   DAT-built world the theory body already uses, so either shape is
   acceptable; say why in a one-line comment.
+- **G7 — `SC` sits at `DrawSortCell` ENTRY, before `DrawBuilding` (blocking,
+  transcript lens).** Retail's `bp 0059f140` fires at `RenderDeviceD3D::DrawSortCell`
+  entry and `DrawBuilding` @0x0059f2a0 is called from INSIDE it, so retail
+  prints `LC` → `SC` → `BLD` (`terrace-edge.walk.log:2331-2333`; a not-in-view
+  cell prints `SC` then `BLD` with no `LC`, `:1042-1044`). acdream prints `SC`
+  from `OnLandscapeCellTurn`, which `RetailFrameWalk` calls AFTER
+  `DrawBuilding`. Fix: `RetailFrameWalk.DrawLandscape` calls a new
+  `IWalkEventSink.OnSortCellTurn(landblockId, side, cellIndex)` at the
+  `DrawSortCell` entry point (after the LC turn, before `DrawBuilding`, under
+  the same `AlwaysDrawObjects || in view` gate); the driver prints `SC`
+  there and nowhere else; the object-list turn after the building is
+  unchanged. MUTATION: with the print moved back after `DrawBuilding`, the
+  terrace-edge conformance row (G10) must fail on the first building.
+- **G8 — the trailing `OC <viewer land cell>` of every outdoor frame (major).**
+  It is retail's WEATHER pass: `GameSky::Draw` @0x00506ff0 with `arg2 == 1`
+  runs `if (LScape::weather_enabled != 0)
+  DrawObjCellForDummies(this->after_sky_cell)` @0x005070da — the rain
+  emitters live in the after-sky cell, whose DID is the viewer's land cell
+  (`terrace-edge.walk.log:1416` `OC f418000b` = the `P` cell, once per
+  complete frame; 12 EC vs 16 OC in that capture are exactly these four). It
+  is NOT a walk turn and NOT the creature-mode `DrawObjCellForDummies(creature_cell)`
+  @0x00452be1. acdream's equivalent is `RenderWeather`
+  (`RetailPViewPassExecutor.DrawLandscapeSliceLate`, gated on the player
+  being outside): print `OC <viewer land cell>` at that call when the weather
+  pass actually runs, print-only, with the addresses in the comment; rewrite
+  `PrintObjectCellTurn`'s doc, which currently denies the line exists.
+- **G9 — the EC evidence comment is false (minor).** "EC and OC counts are
+  always equal" — terrace-edge has 12 EC / 16 OC (G8). The conclusion (EC is
+  per flood visit; the stamp dedupe lives inside `DrawEnvCell`, past the
+  breakpoint) is right; the proof is `holtburg-doorway-still.walk.log:1126,
+  1131, 1134, 1137` — `EC a9b40100` four times in one frame across four
+  look-in `DC` turns. Fix both comment sites.
+- **G10 — the conformance signature must see the new kinds (minor → required).**
+  `WalkTraceReplayContext.Signature` drops LC/SC/EC/OC, so no test compares
+  their placement against retail — which is how G7 shipped green. Extend
+  the test-side `Recorder` with `OnLandCellTurn`/`OnSortCellTurn` and include
+  `LC`/`SC` in BOTH signatures; derive `EC`/`OC` for each `DC` from its cell
+  list (retail's two reverse loops: every shell far-to-near, then every
+  object list far-to-near — the driver's own order) on both sides; exclude
+  the trailing weather `OC` from the comparison (assert separately that an
+  outdoor retail frame ends with `OC <P cell>`). The four kit-pose rows must
+  then reproduce at the eight-kind level, or the FIRST divergence is
+  reported in deviations with its position (a real finding, not a skip).
 - Gates unchanged (§11.3); the InstalledDat lane must still show only the
   three known failures; the new still-fixture rows must still reproduce.