checkpoint(render): portal-haze root cause — emitters need own-cell membership (S2 chunk 6 contract)

Instrumented arrivals show the Hidden-state cloud's emitters spawn in the
arrival cell, become view-eligible when the world appears, and are never
drawn: the walk draws an owner's emitters only through the owner's registry
rows, and a hidden owner's shadow is suspended. Retail's
CPhysicsObj::add_particle_shadow_to_cell (0x00514a70) gives an emitter one
shadow in its own cell, drawn at that cell's turn regardless of the parent's
hidden state. S2 chunk 6 (packet §10) ports that: per-cell emitter draw
membership, owner-union particle path deleted. Route timing fixed so the
arrival screenshots anchor on the reveal.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

docs/research/2026-09-01-overhaul/s2-membership-ownership-map.md

@@ -717,6 +717,66 @@ lead-verified against the source before any edit).**
 | A10 | `_cellStatics`/`_cellDynamics` + `GetCellCount`/`CopyCellTo`/`GetCellStaticCount`/`CopyCell*To` had zero production callers | deleted | `ArchRenderSceneTests` updated |
 | A11/A12, R5–R7 | live list handed out; probe-flag coupling; unloaded-neighbour rows; circumsphere cheap reject; particle branch | documented (AD-117 items 2–4; S5 tail) | — |
 
+## 10. Chunk 6 — particle emitter membership (owner G2 finding, 2026-09-03)
+
+**Finding.** After a portal the purple cloud around the arriving character no
+longer shows. Instrumented run `logs/selfgate-20260903-054153-haze-candidate-2`
+(`ACDREAM_DUMP_PLAYSCRIPT=1`, temporary `[pes-spawn]`/`[pes-vis]` traces):
+the server keeps the player HIDDEN until acdream sends LoginComplete at reveal
+`complete` (retail-correct); the Hidden-state script's 14 emitters spawn in
+the arrival cell right after `materialized`, become view-eligible at
+`world-visible`, and are never drawn (frame `h02-arrive-400ms`: room visible,
+no character, no cloud), then the UnHide script stops them at `complete`.
+Cause: the walk draws an owner's emitters only when the owner's registry
+rows are in the cell (`WalkFrameDriver` `CellParticles`/`StaticParticles`
+owner unions → `DrawForOwners`), and a hidden owner's shadow is suspended.
+Before chunk 5 the deleted parent-cell fallback bucketed the hidden player
+anyway, which is why the cloud used to draw. The ledger's "particle emitters
+never reach the registry — no production path" (AD-117 item 4) was wrong:
+this is that path.
+
+**Retail truth.** `CPhysicsObj::add_particle_shadow_to_cell` 0x00514a70: an
+emitter (`state & 0x1000`) owns exactly ONE shadow object in ITS OWN current
+cell (`this->cell`), `CObjCell::add_shadow_object(cell, shadow, 1)` and
+`CPartArray::AddPartsShadow(part_array, this->cell, 1)` (no clip planes); the
+`add_shadows_to_cells` branch at 0x00514aed skips the CELLARRAY flood for it.
+It is drawn at that cell's object turn like any object, independent of its
+parent's hidden state — that IS the cloud around a hidden, portalling player.
+
+**Contract (behavior change).** An emitter's draw membership is its own cell:
+1. `ParticleSystem` keeps a per-pass `cell → renderable handles` index,
+   maintained where `RefreshRenderableIndex` adds/removes and where
+   `UpdateEmitterOwnerCell` changes the cell (an emitter is in exactly one
+   cell; `OwnerCellId` is the owner's pose-registry cell, which is kept while
+   the owner is hidden). New API `CopyRenderableEmittersInCell(pass, cellId,
+   destination)`; no per-frame allocation after warmup.
+2. `ParticleRenderer.DrawForCell(camera, cameraWorldPos, pass, cellId, clipSlot)`
+   beside `DrawForOwners`.
+3. The walk draws particles BY CELL at the existing turns: interior
+   `CellParticles` (cell id), landscape `StaticParticles` (land cell id;
+   building-shell turns draw the building's interior cells' emitters at their
+   own cell turns instead), the post-replay interior flood-cell pass
+   (`RetailPViewRenderer` `_cellParticleOwnerScratch`), and look-in cells
+   (`DrawBuildingLookInDynamics`). Every owner-union path for particles
+   (`UnionOwners`/`UnionNewOwners` over `GetCellStatics`/`GetCellDynamics`/
+   `GetOutdoorStatics`/`GetOutdoorDynamics` for particle purposes,
+   `_outdoorParticleOwnersDrawnThisFrame`, `_particleClassifications.Outdoor`/
+   `Visible`, `RetailPViewCellSliceContext.ParticleOwnerIds`,
+   `RetailPViewLandscapeStaticParticleContext.ParticleOwnerIds`) is deleted —
+   an emitter is in one cell, so no cross-cell dedupe is needed.
+   `DrawUnattachedSceneParticles` (owner 0) is unchanged this chunk.
+4. `ApplyRetailView`'s eligibility (owner cell in the visible set + range)
+   stays as the retail `ShouldDrawParticles` gate.
+5. Register: AD-117 item 4 becomes a PORT note (own-cell membership tracked by
+   the particle system's cell index rather than a registry row — the emitter
+   is not a physics object in acdream; record that residual in the row).
+6. Tests: cell index add/remove/move and "hidden owner's emitter still
+   enumerated by cell" (Core); executor/walk draws by cell (App, replace the
+   owner-id fixtures); the probe route `route-portal-haze.txt` frame
+   `h02-arrive-400ms` must show the cloud (lead runs it).
+Temporary probes (`[pes-spawn]`, `[pes-vis]`, the `HiddenTraceEnabled` field)
+are deleted in the same commit as the fix.
+
 Verified-correct list from both reviews (kept for S5): Contract A dispatch,
 `find_bbox_cell_list` shape, `AddPartsShadow` order/clip-plane rule,
 movement from the transition's array, keep-when-empty, child inheritance

src/AcDream.App/World/LiveEntityPresentationController.cs

@@ -21,6 +21,9 @@ public sealed class LiveEntityPresentationController : IDisposable
     public const uint UnHideScriptType = 0x75u;
     public const uint HiddenScriptType = 0x76u;
 
+    private static readonly bool HiddenTraceEnabled =
+        Environment.GetEnvironmentVariable("ACDREAM_DUMP_PLAYSCRIPT") == "1";
+
     private readonly LiveEntityRuntime _liveEntities;
     private readonly ShadowObjectRegistry _shadows;
     private readonly Func<uint, uint, float, bool> _playTyped;

tools/overhaul-selfgate/route-portal-haze.txt

@@ -1,6 +1,7 @@
 # Portal-exit haze probe route (2026-09-03, owner finding at the G2 check).
-# Teleport, then shoot at short intervals after the world reveals so the
+# Teleport, let the client ENTER portal space first (sleep), then wait for
-# UnHide (0x75) script's emitters are in frame if they draw at all.
+# the world to come back and shoot at short intervals so the UnHide (0x75)
+# script's emitters are in frame if they draw at all.
 
 wait world-visible 180000
 sleep 3000
@@ -8,6 +9,7 @@ screenshot h00-before 15000
 
 # Facility Hub pose (interior arrival)
 command /teleloc 8A02015E 60.251431 -38.848198 -5.995000 0.995004 0.000000 0.000000 -0.099833
+sleep 1500
 wait world-visible 90000
 screenshot h01-arrive-0ms 15000
 sleep 400
@@ -18,9 +20,11 @@ sleep 1000
 screenshot h04-arrive-2000ms 15000
 sleep 2000
 screenshot h05-arrive-4000ms 15000
+sleep 4000
 
 # Holtburg house pose (a second arrival, outdoor landblock)
 command /teleloc A9B4013F 134.555893 11.423566 94.005005 0.996917 0.000000 0.000000 -0.078459
+sleep 1500
 wait world-visible 90000
 screenshot h11-arrive-0ms 15000
 sleep 400
@@ -29,5 +33,6 @@ sleep 600
 screenshot h13-arrive-1000ms 15000
 sleep 1000
 screenshot h14-arrive-2000ms 15000
+sleep 3000
 
 close-client