diff --git a/Assets/Scripts/Mechanics/GameOptimizer.cs b/Assets/Scripts/Mechanics/GameOptimizer.cs
index 836f088..b24e528 100644
--- a/Assets/Scripts/Mechanics/GameOptimizer.cs
+++ b/Assets/Scripts/Mechanics/GameOptimizer.cs
@@ -29,6 +29,8 @@ namespace Platformer.Mechanics
 
             // Layer Matrix: Player(13) ↔ Enemy(14) 충돌 OFF.
             Physics2D.IgnoreLayerCollision(13, 14, true);
+            // BT99 — Player(13) ↔ EnemyWall(18) 충돌 OFF (투명벽은 Enemy만 차단).
+            Physics2D.IgnoreLayerCollision(13, 18, true);
         }
 
         [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.AfterSceneLoad)]
@@ -150,10 +152,78 @@ namespace Platformer.Mechanics
                     var lvlTc = levelGo.GetComponent<UnityEngine.Tilemaps.TilemapCollider2D>();
                     if (lvlTc != null) lvlTc.ProcessTilemapChanges();
                     Debug.Log($"[GameOptimizer] AutoForeground moved={movedHigh + movedSmall} (high={movedHigh} small={movedSmall} threshold={airThresholdY:F2}) / Layer16 applied={applied} levelKept0={levelKept} excluded={excluded}");
+
+                    // BT99 — 절벽 영역 자동 검출·투명벽 (EnemyWall Layer 18) GameObject 자동 생성
+                    SetupCliffWalls(levelTilemap, fgTilemap, pdForeground);
                 }
             }
         }
 
+        /// <summary>
+        /// BT99 — 절벽 영역 자동 검출 + 투명벽 GameObject 생성 (Enemy 차단·Player 통과).
+        /// 모든 Tilemap (Level·AutoForeground·PD Foreground) 영역에서 Tile 좌·우 인접 영역이 모든 Tilemap에 Tile X 시 = 절벽 가장자리.
+        /// </summary>
+        static void SetupCliffWalls(UnityEngine.Tilemaps.Tilemap levelTm, UnityEngine.Tilemaps.Tilemap autoFgTm, GameObject pdFg)
+        {
+            UnityEngine.Tilemaps.Tilemap pdFgTm = pdFg != null ? pdFg.GetComponent<UnityEngine.Tilemaps.Tilemap>() : null;
+
+            GameObject wallParent = GameObject.Find("CliffWalls");
+            if (wallParent == null) wallParent = new GameObject("CliffWalls");
+
+            int wallCount = 0;
+            var allTilemaps = new System.Collections.Generic.List<UnityEngine.Tilemaps.Tilemap>();
+            if (levelTm != null) allTilemaps.Add(levelTm);
+            if (autoFgTm != null) allTilemaps.Add(autoFgTm);
+            if (pdFgTm != null) allTilemaps.Add(pdFgTm);
+
+            foreach (var tm in allTilemaps)
+            {
+                var bounds = tm.cellBounds;
+                for (int x = bounds.xMin; x <= bounds.xMax; x++)
+                {
+                    for (int y = bounds.yMin; y <= bounds.yMax; y++)
+                    {
+                        var pos = new Vector3Int(x, y, 0);
+                        if (!tm.HasTile(pos)) continue;
+
+                        bool leftCliff = !HasTileInAny(allTilemaps, pos + Vector3Int.left);
+                        bool rightCliff = !HasTileInAny(allTilemaps, pos + Vector3Int.right);
+                        if (!leftCliff && !rightCliff) continue;
+
+                        Vector3 worldPos = tm.CellToWorld(pos) + new Vector3(0.5f, 0.5f, 0f);  // cell center
+                        if (leftCliff)
+                        {
+                            CreateCliffWall(wallParent, worldPos + new Vector3(-0.5f, 0f, 0f));
+                            wallCount++;
+                        }
+                        if (rightCliff)
+                        {
+                            CreateCliffWall(wallParent, worldPos + new Vector3(0.5f, 0f, 0f));
+                            wallCount++;
+                        }
+                    }
+                }
+            }
+            Debug.Log($"[GameOptimizer] CliffWalls (EnemyWall Layer 18) 생성: {wallCount}개");
+        }
+
+        static bool HasTileInAny(System.Collections.Generic.List<UnityEngine.Tilemaps.Tilemap> tms, Vector3Int pos)
+        {
+            foreach (var tm in tms) if (tm != null && tm.HasTile(pos)) return true;
+            return false;
+        }
+
+        static void CreateCliffWall(GameObject parent, Vector3 worldPos)
+        {
+            GameObject wall = new GameObject("CliffWall");
+            wall.transform.SetParent(parent.transform, false);
+            wall.transform.position = worldPos;
+            wall.layer = 18;  // EnemyWall
+            var box = wall.AddComponent<BoxCollider2D>();
+            box.size = new Vector2(0.1f, 3f);  // 좁고 높은 영역
+            box.offset = new Vector2(0f, 1f);  // Tile 위 영역 차단 (지면 위 1.5m)
+        }
+
         /// <summary>
         /// 작은 공중 발판 판별: 위·아래 인접 Tile이 모두 빈 공간 + 가로 연속 길이 maxWidth 이하.
         /// 일반 지면(10+ tile 가로) 잘못 분류 방지.
diff --git a/ProjectSettings/TagManager.asset b/ProjectSettings/TagManager.asset
index ac346d4..7b98209 100644
--- a/ProjectSettings/TagManager.asset
+++ b/ProjectSettings/TagManager.asset
@@ -24,7 +24,7 @@ TagManager:
   - 
   - 
   - 
-  - 
+  - EnemyWall
   - 
   - 
   -