Fix InteriorMap not hiding its multi-mesh instances when hidden

interior/interior_map.gd

@@ -41,9 +41,9 @@ class Chunk:
 	##
 	func invalidate(interior_map: InteriorMap, coordinate: Vector2i) -> void:
 		# TODO: Once this is all lowered into native code, look for ways to parallelize the loops.
-		for multimesh_instance in _multimesh_instances:
-			RenderingServer.free_rid(multimesh_instance._instance_rid)
-			RenderingServer.free_rid(multimesh_instance._multimesh_rid)
+		for multi_mesh_instance in _multimesh_instances:
+			RenderingServer.free_rid(multi_mesh_instance._instance_rid)
+			RenderingServer.free_rid(multi_mesh_instance._multimesh_rid)
 
 		_multimesh_instances.clear()
 
@@ -85,11 +85,11 @@ class Chunk:
 		var global_transform := interior_map.global_transform
 
 		for chunk_mesh in transforms_by_mesh:
-			var multimesh_instance := MultiMeshInstance.new(
+			var multi_mesh_instance := MultiMeshInstance.new(
 				scenario_rid, chunk_mesh.get_rid(), transforms_by_mesh[chunk_mesh])
 
-			multimesh_instance.set_offset(global_transform)
-			_multimesh_instances.append(multimesh_instance)
+			multi_mesh_instance.set_offset(global_transform)
+			_multimesh_instances.append(multi_mesh_instance)
 
 	##
 	## Sets the floor mesh in the chunk at the location relative [code]coordinatess[/code] to
@@ -140,11 +140,17 @@ class MultiMeshInstance:
 			RenderingServer.multimesh_instance_set_transform(_multimesh_rid, i, transforms[i])
 
 	##
-	## Sets the parent transform of all mesh instances under it to [code]offset[/code].
+	## Sets the transform of the instance to [code]offset[/code].
 	##
 	func set_offset(offset: Transform3D) -> void:
 		RenderingServer.instance_set_transform(_instance_rid, offset)
 
+	##
+	## Sets the visibility of the instance to [code]is_visible[/code].
+	##
+	func set_visible(is_visible: bool) -> void:
+		RenderingServer.instance_set_visible(_instance_rid, is_visible)
+
 var _chunks: Array[Chunk] = []
 
 var _chunks_size := Vector2i.ZERO
@@ -172,8 +178,13 @@ func _notification(what: int) -> void:
 	match what:
 		NOTIFICATION_TRANSFORM_CHANGED:
 			for chunk in _chunks:
-				for multimesh_instance in chunk._multimesh_instances:
-					multimesh_instance.set_offset_transform(global_transform)
+				for multi_mesh_instance in chunk._multimesh_instances:
+					multi_mesh_instance.set_offset_transform(global_transform)
+
+		NOTIFICATION_VISIBILITY_CHANGED:
+			for chunk in _chunks:
+				for multi_mesh_instance in chunk._multimesh_instances:
+					multi_mesh_instance.set_visible(visible)
 
 ##
 ## Clears the entirety of the tile grid to only contain tiles of instance [code]tile[/code] pointing