diff --git a/src/AcDream.App/Rendering/Walk/WalkProductionWorldData.cs b/src/AcDream.App/Rendering/Walk/WalkProductionWorldData.cs
index 17392765..a9ef6195 100644
--- a/src/AcDream.App/Rendering/Walk/WalkProductionWorldData.cs
+++ b/src/AcDream.App/Rendering/Walk/WalkProductionWorldData.cs
@@ -65,14 +65,17 @@ internal sealed class WalkProductionWorldData : IWalkFrameWorldData
         foreach (List<RenderProjectionRecord> bucket in _shellsByAnchor.Values)
             bucket.Clear();
 
-        int count;
-        while (true)
+        // CopyIndexTo THROWS on an undersized destination (ArchRenderScene
+        // validates up front — the first connected gate run of the FW3.2b-2
+        // cutover crashed on exactly this at Aerlinthe's 5,040 outdoor
+        // statics), so presize from the query's own index counts.
+        int required = _scene.IndexCounts.For(RenderSceneIndex.OutdoorStatic);
+        if (required > _sweepScratch.Length)
         {
-            count = _scene.CopyIndexTo(RenderSceneIndex.OutdoorStatic, _sweepScratch);
-            if (count < _sweepScratch.Length)
-                break;
-            _sweepScratch = new RenderProjectionRecord[_sweepScratch.Length * 2];
+            _sweepScratch = new RenderProjectionRecord[
+                Math.Max(required, _sweepScratch.Length * 2)];
         }
+        int count = _scene.CopyIndexTo(RenderSceneIndex.OutdoorStatic, _sweepScratch);
         for (int i = 0; i < count; i++)
         {
             ref readonly RenderProjectionRecord record = ref _sweepScratch[i];
@@ -111,14 +114,15 @@ internal sealed class WalkProductionWorldData : IWalkFrameWorldData
     {
         if (_cellCache.TryGetValue(cellId, out WalkFrameStaticRecords cached))
             return cached;
-        int count;
-        while (true)
+        // Same up-front-validation contract as CopyIndexTo: presize from the
+        // query's own count rather than probing with an undersized span.
+        int required = _scene.GetCellStaticCount(cellId);
+        if (required > _cellScratch.Length)
         {
-            count = _scene.CopyCellStaticsTo(cellId, _cellScratch);
-            if (count < _cellScratch.Length)
-                break;
-            _cellScratch = new RenderProjectionRecord[_cellScratch.Length * 2];
+            _cellScratch = new RenderProjectionRecord[
+                Math.Max(required, _cellScratch.Length * 2)];
         }
+        int count = _scene.CopyCellStaticsTo(cellId, _cellScratch);
         WalkFrameStaticRecords records = count == 0
             ? WalkFrameStaticRecords.Empty with { TupleLandblockId = _tupleLandblockId }
             : new WalkFrameStaticRecords(_cellScratch[..count], _tupleLandblockId);