Old Tam speaks (Kokoro); CC0 birdsong, crickets and owls; no plants through floors; menu and marker fixes

scripts/world/world.gd

@@ -859,6 +859,11 @@ func spawn_piece(def: Dictionary, xf: Transform3D, extra: Dictionary = {}) -> No
 		build.recompute()
 		if piece.kind == "floor":
 			_update_grass_cuts()
+	# Sticks, stones and plants it's built over are gone (cleared as if picked,
+	# so a server tells everyone and the save keeps it; regrowth won't put them
+	# back under a building). Also on load, for huts built before this.
+	if piece.is_in_group("build") and not WorldNet.is_client():
+		props.clear_under.call_deferred(piece)
 	if server_mode and not _applying:
 		piece_added.emit(piece)
 	return piece