diff --git a/client/scripts/autoloads/fog_state.gd b/client/scripts/autoloads/fog_state.gd
index 2a862efd3..7ae8ec65a 100644
--- a/client/scripts/autoloads/fog_state.gd
+++ b/client/scripts/autoloads/fog_state.gd
@@ -181,6 +181,9 @@ func update_from_state() -> void:
 	# 3. Zone tint: write zone temperature color for currently visible tiles.
 	#    Zone data is stable (tile zone never changes) so we only write on first sight.
 	#    Data persists in _tint_bytes across frames and across resizes.
+	#    visible_tiles carries zone_id per tile (populated from snapshot "tiles" or
+	#    "visible_tiles" with type field — see game_state.gd apply_snapshot).
+	var tiles := GameState.visible_tiles
 	var tint_dirty := false
 	for tile in tiles:
 		if not tile is Dictionary or not tile.has("x") or not tile.has("y"):