diff --git a/include/rendering/terrain_manager.hpp b/include/rendering/terrain_manager.hpp
index e4562537..06215fe7 100644
--- a/include/rendering/terrain_manager.hpp
+++ b/include/rendering/terrain_manager.hpp
@@ -323,6 +323,9 @@ private:
 
     // Dedup set for doodad placements across tile boundaries
     std::unordered_set<uint32_t> placedDoodadIds;
+
+    // Dedup set for WMO placements across tile boundaries (prevents rendering Stormwind 16x)
+    std::unordered_set<uint32_t> placedWmoIds;
 };
 
 } // namespace rendering
diff --git a/src/rendering/terrain_manager.cpp b/src/rendering/terrain_manager.cpp
index a4c97871..ed28217e 100644
--- a/src/rendering/terrain_manager.cpp
+++ b/src/rendering/terrain_manager.cpp
@@ -683,11 +683,20 @@ void TerrainManager::finalizeTile(const std::shared_ptr<PendingTile>& pending) {
 
         int loadedWMOs = 0;
         int loadedLiquids = 0;
+        int skippedWmoDedup = 0;
         for (auto& wmoReady : pending->wmoModels) {
+            // Deduplicate WMO instances by uniqueId (prevents Stormwind from rendering 16x)
+            // uniqueId is stored in modelId field (see line 522 in prepareTile)
+            if (placedWmoIds.count(wmoReady.modelId)) {
+                skippedWmoDedup++;
+                continue;
+            }
+
             if (wmoRenderer->loadModel(wmoReady.model, wmoReady.modelId)) {
                 uint32_t wmoInstId = wmoRenderer->createInstance(wmoReady.modelId, wmoReady.position, wmoReady.rotation);
                 if (wmoInstId) {
                     wmoInstanceIds.push_back(wmoInstId);
+                    placedWmoIds.insert(wmoReady.modelId);
                     loadedWMOs++;
 
                     // Load WMO liquids (canals, pools, etc.)
@@ -710,6 +719,10 @@ void TerrainManager::finalizeTile(const std::shared_ptr<PendingTile>& pending) {
                 }
             }
         }
+        if (loadedWMOs > 0 || skippedWmoDedup > 0) {
+            LOG_INFO("  Loaded WMOs for tile [", x, ",", y, "]: ",
+                     loadedWMOs, " instances, ", skippedWmoDedup, " dedup skipped");
+        }
         if (loadedLiquids > 0) {
             LOG_DEBUG("  Loaded WMO liquids for tile [", x, ",", y, "]: ", loadedLiquids);
         }