Warn users when TileMap is set as Y-sorted but no layer is

scene/2d/tile_map.cpp

@@ -4518,14 +4518,26 @@ PackedStringArray TileMap::get_configuration_warnings() const {
  }
  }
 
- // Check if Y-sort is enabled on a layer but not on the node.
  if (!is_y_sort_enabled()) {
+ // Check if Y-sort is enabled on a layer but not on the node.
  for (const Ref<TileMapLayer> &layer : layers) {
  if (layer->is_y_sort_enabled()) {
  warnings.push_back(RTR("A TileMap layer is set as Y-sorted, but Y-sort is not enabled on the TileMap node itself."));
  break;
  }
  }
+ } else {
+ // Check if Y-sort is enabled on the node, but not on any of the layers.
+ bool need_warning = true;
+ for (const Ref<TileMapLayer> &layer : layers) {
+ if (layer->is_y_sort_enabled()) {
+ need_warning = false;
+ break;
+ }
+ }
+ if (need_warning) {
+ warnings.push_back(RTR("The TileMap node is set as Y-sorted, but Y-sort is not enabled on any of the TileMap's layers.\nThis may lead to unwanted behaviors, as a layer that is not Y-sorted will be Y-sorted as a whole."));
+ }
  }
 
  // Check if we are in isometric mode without Y-sort enabled.