diff --git a/src/AcDream.Core/World/SceneryGenerator.cs b/src/AcDream.Core/World/SceneryGenerator.cs
index c75666d..af0be17 100644
--- a/src/AcDream.Core/World/SceneryGenerator.cs
+++ b/src/AcDream.Core/World/SceneryGenerator.cs
@@ -70,6 +70,12 @@ public static class SceneryGenerator
         HashSet<int>? buildingCells = null,
         float[]? heightTable = null)
     {
+        // Phase N.1: route to the WorldBuilder-backed implementation when
+        // ACDREAM_USE_WB_SCENERY=1. See
+        // docs/superpowers/specs/2026-05-08-phase-n1-scenery-via-wb-helpers-design.md.
+        if (UseWbScenery)
+            return GenerateViaWb(dats, region, block, landblockId, buildingCells);
+
         var result = new List<ScenerySpawn>();
 
         if (region.TerrainInfo?.TerrainTypes is null || region.SceneInfo?.SceneTypes is null)