diff --git a/Assets/Scripts/Mechanics/GameOptimizer.cs b/Assets/Scripts/Mechanics/GameOptimizer.cs
index 32bbd28..9390b2f 100644
--- a/Assets/Scripts/Mechanics/GameOptimizer.cs
+++ b/Assets/Scripts/Mechanics/GameOptimizer.cs
@@ -102,6 +102,13 @@ namespace Platformer.Mechanics
                         {
                             var pos = new Vector3Int(x, y, 0);
                             if (!levelTilemap.HasTile(pos)) continue;
+
+                            // BT63 — Tile asset의 m_ColliderType=None = 배경 의도 (tree·plant·fence·house) = 자동 분류 제외
+                            //         BT48 시점 + 나무 충돌 정정만 추가 (PD 명시 채택 2026-05-07).
+                            //         결과: 나무·plant·fence·house Tile은 Level 잔존·자체 None Collider로 자연 통과.
+                            var tileAsset = levelTilemap.GetTile<UnityEngine.Tilemaps.Tile>(pos);
+                            if (tileAsset != null && tileAsset.colliderType == UnityEngine.Tilemaps.Tile.ColliderType.None) continue;
+
                             Vector3 worldPos = levelTilemap.CellToWorld(pos);
                             bool aboveThreshold = worldPos.y >= airThresholdY;
                             bool isSmallAir = !aboveThreshold && IsSmallAirPlatform(levelTilemap, pos, MAX_PLATFORM_WIDTH);