#121: dynamics-owner particle pass - world portals visible again; re-gate ledger in ISSUES

Fix: dynamics' ATTACHED emitters (portal swirls on server-spawned portal
entities, creature effects) fell through EVERY particle filter under the
unified pview path - the landscape slice filter carries outdoor statics
(+ the #118 outside-stage dynamics), the per-cell callback carries cell
statics, and T4 deleted the clipRoot==null global pass from normal
frames. T5 never checked portals; the user's re-gate caught it ("all
portals that were previously showing are now gone"). DrawDynamicsLast
now hands its cone-surviving dynamics (minus outside-stage entities,
whose emitters already drew in the landscape slice - alpha particles
must not double-draw) to a new DrawDynamicsParticles callback;
GameWindow draws Scene-pass emitters filtered to those owner ids,
mirroring DrawRetailPViewCellParticles. Retail shape: emitters draw
with their owner object.

Re-gate ledger (user verdicts are axioms):
- #117 CLOSED ("Yes solved"), #118 CLOSED ("Yes solved" + NPC-through-
  door "Yes fixed").
- #108 REOPENED narrowed: cellar-ascent eye-below-grade window only
  (grass covers the exit door until the head pops over ground level);
  fix belongs on the membership/viewer side - the depth-gated punch
  stays (DO-NOT-RETRY).
- #119 user split: phantom walkable stairs at the hill cottage (#113
  family), tower missing stairs + barrel (#119 proper), hill-house
  transparent-on-entry (#112 - re-check after the #120 fix; the
  ping-pong fired at exactly A9B3 0103/010F).
- #120 FIXED pending re-gate (dede7e4).
- NEW #122 window oscillation on entry (re-check after #120 first),
  NEW #123 buildings transiently disappear running close past,
  NEW #124 far-building back walls missing through openings (lead:
  per-building look-in floods run only for outdoor roots -
  NearbyBuildingCells is null for interior roots; retail runs the
  look-in inside LScape::draw for ANY root).

Suites: App 236, Core 1419+2skip, UI 420, Net 294.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/AcDream.App/Rendering/GameWindow.cs

@@ -7729,6 +7729,8 @@ public sealed class GameWindow : IDisposable
                             forceFarZ: clipRoot.IsOutdoorNode),
                     DrawCellParticles = sliceCtx =>
                         DrawRetailPViewCellParticles(sliceCtx, camera, camPos),
+                    DrawDynamicsParticles = survivors =>
+                        DrawRetailPViewDynamicsParticles(survivors, camera, camPos),
                     EmitDiagnostics = result =>
                         EmitRetailPViewDiagnostics(
                             result,
@@ -9630,6 +9632,43 @@ public sealed class GameWindow : IDisposable
         DisableClipDistances();
     }
 
+    // #121: the dynamics-owner particle pass — Scene-pass emitters attached to
+    // the frame's cone-surviving dynamics (portal swirls on server-spawned
+    // portal entities, creature effects). Retail draws emitters with their
+    // owner object; before this pass, dynamics' emitters fell through every
+    // pview particle filter (landscape slice = outdoor statics + #118
+    // outside-stage dynamics; cell callback = cell statics) once T4 deleted
+    // the clipRoot==null global pass from normal frames — every world portal
+    // went invisible. Mirror of DrawRetailPViewCellParticles with the
+    // survivors' ids as the filter.
+    private readonly HashSet<uint> _dynamicsSceneParticleEntityIds = new();
+
+    private void DrawRetailPViewDynamicsParticles(
+        IReadOnlyList<AcDream.Core.World.WorldEntity> survivors,
+        ICamera camera,
+        System.Numerics.Vector3 camPos)
+    {
+        if (_particleSystem is null || _particleRenderer is null || survivors.Count == 0)
+            return;
+
+        _dynamicsSceneParticleEntityIds.Clear();
+        foreach (var entity in survivors)
+            _dynamicsSceneParticleEntityIds.Add(ParticleEntityKey(entity));
+
+        if (_dynamicsSceneParticleEntityIds.Count == 0)
+            return;
+
+        DisableClipDistances();
+        _particleRenderer.Draw(
+            _particleSystem,
+            camera,
+            camPos,
+            AcDream.Core.Vfx.ParticleRenderPass.Scene,
+            emitter => emitter.AttachedObjectId != 0
+                       && _dynamicsSceneParticleEntityIds.Contains(emitter.AttachedObjectId));
+        DisableClipDistances();
+    }
+
     private void EmitRetailPViewDiagnostics(
         AcDream.App.Rendering.RetailPViewFrameResult result,
         LoadedCell clipRoot,

src/AcDream.App/Rendering/RetailPViewRenderer.cs

@@ -445,6 +445,26 @@ public sealed class RetailPViewRenderer
 
         UseIndoorMembershipOnlyRouting();
         DrawEntityBucket(ctx, _dynamicsScratch, visibleCellIds: null);
+
+        // #121: dynamics' attached emitters (portal swirls, creature effects)
+        // gate through the SAME cone-surviving owner set as their meshes —
+        // retail draws emitters with the owner object. Before this callback,
+        // dynamics' emitters fell through EVERY particle filter under the pview
+        // path (the landscape slice carries outdoor statics + #118 outside-
+        // stage dynamics; the cell callback carries cell statics; T4 deleted
+        // the old clipRoot==null global pass from normal frames) — all world
+        // portals went invisible. Outside-stage dynamics are excluded here:
+        // their emitters already drew in the landscape slice (alpha-blended
+        // particles must not double-draw, unlike the depth-idempotent meshes).
+        if (ctx.DrawDynamicsParticles is not null)
+        {
+            _dynamicsParticleScratch.Clear();
+            foreach (var e in _dynamicsScratch)
+                if (!_outsideStageDynamics.Contains(e))
+                    _dynamicsParticleScratch.Add(e);
+            if (_dynamicsParticleScratch.Count > 0)
+                ctx.DrawDynamicsParticles(_dynamicsParticleScratch);
+        }
     }
 
     private void DrawCellObjectLists(
@@ -509,6 +529,9 @@ public sealed class RetailPViewRenderer
     // #118: dynamics assigned to the OUTSIDE stage this frame (interior roots
     // only) — outdoor-classified + exit-portal straddlers. Cleared per frame.
     private readonly List<WorldEntity> _outsideStageDynamics = new();
+    // #121: cone-surviving dynamics whose emitters draw in the dynamics
+    // particle pass (survivors minus outside-stage). Cleared per use.
+    private readonly List<WorldEntity> _dynamicsParticleScratch = new();
 
     /// <summary>
     /// #118 stage assignment for a dynamic under an INTERIOR root: does it draw
@@ -650,6 +673,11 @@ public interface IRetailPViewCellDrawContext : IRetailPViewCellDrawCallbacks
     public FrustumPlanes? Frustum { get; }
     public uint? PlayerLandblockId { get; }
     public HashSet<uint>? AnimatedEntityIds { get; }
+
+    /// <summary>#121: draw the Scene-pass emitters attached to the frame's
+    /// cone-surviving dynamics (portal swirls, creature effects). Invoked once
+    /// per frame after the last entity pass with the survivor list.</summary>
+    public Action<IReadOnlyList<WorldEntity>>? DrawDynamicsParticles { get; }
 }
 
 public sealed class RetailPViewDrawContext : IRetailPViewCellDrawContext
@@ -683,6 +711,7 @@ public sealed class RetailPViewDrawContext : IRetailPViewCellDrawContext
     public Action? ClearDepthForInterior { get; init; }
     public Action<RetailPViewCellSliceContext>? DrawExitPortalMasks { get; init; }
     public Action<RetailPViewCellSliceContext>? DrawCellParticles { get; init; }
+    public Action<IReadOnlyList<WorldEntity>>? DrawDynamicsParticles { get; init; }
     public Action<RetailPViewFrameResult>? EmitDiagnostics { get; init; }
 }