diff --git a/scripts_unity/Editor/GeoTilePrefabImporter.cs b/scripts_unity/Editor/GeoTilePrefabImporter.cs
index 22761fa..3b2f933 100644
--- a/scripts_unity/Editor/GeoTilePrefabImporter.cs
+++ b/scripts_unity/Editor/GeoTilePrefabImporter.cs
@@ -399,15 +399,12 @@ public class GeoTilePrefabImporter : EditorWindow
             ApplyOrthoTexture(terrainData, tile.TileId);
         }
 
-        // Create root GameObject with Terrain
-        var root = new GameObject(tile.TileId);
-        var terrain = root.AddComponent<Terrain>();
-        terrain.terrainData = terrainData;
+        // Create root GameObject with Terrain (ensures prefab contains the terrain asset)
+        var root = Terrain.CreateTerrainGameObject(terrainData);
+        root.name = tile.TileId;
+        var terrain = root.GetComponent<Terrain>();
         terrain.drawInstanced = true;
 
-        var collider = root.AddComponent<TerrainCollider>();
-        collider.terrainData = terrainData;
-
         // Store metadata as component for later use
         var metadata = root.AddComponent<GeoTileMetadata>();
         metadata.tileId = tile.TileId;
@@ -507,6 +504,7 @@ public class GeoTilePrefabImporter : EditorWindow
         instance.name = "Buildings";
         instance.transform.SetParent(root.transform, false);
         instance.transform.localPosition = new Vector3(0f, -(float)tile.GlobalMin, 0f);
+        instance.transform.localRotation = Quaternion.Euler(0f, 180f, 0f);
         instance.isStatic = true;
     }
 
@@ -529,11 +527,10 @@ public class GeoTilePrefabImporter : EditorWindow
         // Tree GLB vertices use absolute elevation (z_ground from DGM).
         // Since prefab root will be at Y=gmin when placed, offset trees by -gmin
         // so tree world Y = gmin + (-gmin) + GLB_Y = GLB_Y (correct absolute elevation)
-        // Scale Z by -1 to correct coordinate system mismatch (Python negates Z in export)
         var treesContainer = new GameObject("Trees");
         treesContainer.transform.SetParent(root.transform, false);
         treesContainer.transform.localPosition = new Vector3(0f, -(float)tile.GlobalMin, 0f);
-        treesContainer.transform.localScale = new Vector3(1f, 1f, -1f);
+        treesContainer.transform.localRotation = Quaternion.Euler(0f, 180f, 0f);
         treesContainer.isStatic = true;
 
         foreach (var chunkPath in chunkFiles)
@@ -934,28 +931,3 @@ public class GeoTilePrefabImporter : EditorWindow
 
     #endregion
 }
-
-/// <summary>
-/// Component attached to tile prefab roots to store geo metadata.
-/// Useful for positioning prefabs in scene or querying tile info at runtime.
-/// </summary>
-public class GeoTileMetadata : MonoBehaviour
-{
-    public string tileId;
-    public double xmin;
-    public double ymin;
-    public double globalMin;
-    public double globalMax;
-
-    /// <summary>
-    /// Returns the world position this tile should be placed at, given a global origin.
-    /// </summary>
-    public Vector3 GetWorldPosition(double originX, double originY)
-    {
-        return new Vector3(
-            (float)(xmin - originX),
-            (float)globalMin,
-            (float)(ymin - originY)
-        );
-    }
-}
diff --git a/scripts_unity/GeoDataUtils/GeoTileMetadata.cs b/scripts_unity/GeoDataUtils/GeoTileMetadata.cs
new file mode 100644
index 0000000..e48e676
--- /dev/null
+++ b/scripts_unity/GeoDataUtils/GeoTileMetadata.cs
@@ -0,0 +1,26 @@
+using UnityEngine;
+
+/// <summary>
+/// Component attached to tile prefab roots to store geo metadata.
+/// Useful for positioning prefabs in scene or querying tile info at runtime.
+/// </summary>
+public class GeoTileMetadata : MonoBehaviour
+{
+    public string tileId;
+    public double xmin;
+    public double ymin;
+    public double globalMin;
+    public double globalMax;
+
+    /// <summary>
+    /// Returns the world position this tile should be placed at, given a global origin.
+    /// </summary>
+    public Vector3 GetWorldPosition(double originX, double originY)
+    {
+        return new Vector3(
+            (float)(xmin - originX),
+            (float)globalMin,
+            (float)(ymin - originY)
+        );
+    }
+}