Script para godot instacia una camara y hace un cambio de plano de escena mientras esta dentro del Area3d;

 extends Area3D

var Extra = preload("res://CAMARAEXTRAPARASERINSTANCIADA.tscn")

# Called when the node enters the scene tree for the first time.

func _ready():

pass # Replace with function body.

# Called every frame. 'delta' is the elapsed time since the previous frame.

func _process(delta):

pass

func _on_area_entered(area):

var extra=Extra.instantiate()

add_child(extra)

pass # Replace with function body.

func _on_area_exited(area):

queue_free()

pass # Replace with function body.