Исправление.

W 0:00:01:527   The variable "tile" is declared below in the parent block.
<Ошибка GDScript>CONFUSABLE_LOCAL_DECLARATION
<Исходный код GDScript>tilemap.gd:567

scenes/tilemap/tilemap.gd

@@ -562,14 +562,15 @@ func get_tile(x: int, y: int, z: int) -> Tile:
 
     var idx: int = xyz_to_idx(x, y, z)
 
+    var tile = null
     var req: = get_node_or_null(NodePath(TILE_REQUEST_NAME % idx))
     if req:
-        var tile = req.get_meta('tile')
+        tile = req.get_meta('tile')
         if tile != null:
             tile.t = now
             return tile
 
-    var tile = _cache.get(idx)
+    tile = _cache.get(idx)
     if tile:
         tile.t = now
         return tile