fix #451: stabilize portal seam rendering

src/AcDream.App/Rendering/WorldScenePassExecutor.cs

@@ -221,17 +221,10 @@ internal sealed class WorldScenePassExecutor : IWorldScenePassExecutor
             return AppendSignature(currentSignature, "global");
         }
 
-        if (clipRoot.IsOutdoorNode)
-        {
-            _particleRenderer.DrawForOwners(
-                camera.Camera,
-                camera.Position,
-                ParticleRenderPass.Scene,
-                outdoorOwnerIds,
-                includeUnattached: true);
-            return AppendSignature(currentSignature, "unattached");
-        }
-
+        // Every PView root, including the outdoor sentinel, now submits scene
+        // particles inside LScape::draw. Replaying them here is both a duplicate
+        // and too late: it occurs after nested building cells, allowing exterior
+        // waterfall/foliage alpha to repaint an indoor/outdoor transition.
         return currentSignature;
     }