Improved signal handling

client/Global.gd

@@ -1,12 +1,21 @@
 extends Node
 
+@export var environment: Environment
+@export var camera_attributes: CameraAttributesPractical
+
 var camera: Camera3D
 var player: Player
+var viewport: Viewport
+var window: Window
 var players: PlayerManager
 var account_id: String
 var auth_token: String
 var interacting_with_ui: bool
 var instance_id: int
 var username: String
-var environment: Environment
-var camera_attributes: CameraAttributesPractical
+
+func _enter_tree():
+	instance_id = OS.get_process_id() % 4
+	username = "user%d" % instance_id
+	viewport = get_viewport()
+	window = get_window()