Finally restored what we had working two days ago.

Got caught in
godotengine/godot#17326, had to stop using ViewportContainer entirely. Means other hacks (mainly size/positioning in code) but it works

CenterContainer.gd

@@ -0,0 +1,20 @@
+extends CenterContainer
+
+
+# Declare member variables here. Examples:
+# var a = 2
+# var b = "text"
+
+
+# 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_CenterContainer_mouse_entered():
+	print("_on_CenterContainer_mouse_entered")

Control.tscn

@@ -6,3 +6,9 @@ margin_bottom = 40.0
 __meta__ = {
 "_edit_use_anchors_": false
 }
+
+[node name="CenterContainer" type="CenterContainer" parent="."]
+margin_right = 40.0
+margin_bottom = 40.0
+
+[node name="Node2D" type="Node2D" parent="CenterContainer"]

DialogueButton.tscn

@@ -1,6 +1,7 @@
 [gd_scene format=2]
 
 [node name="DialogueButton" type="Button"]
+light_mask = 2
 margin_right = 12.0
 margin_bottom = 20.0
 __meta__ = {

HUD.gd

@@ -1,4 +1,4 @@
-extends Control
+extends Node2D
 
 signal open_student
 

HUD.tscn

@@ -8,13 +8,8 @@ size = 32
 outline_color = Color( 0, 0, 0, 1 )
 font_data = ExtResource( 1 )
 
-[node name="HUD" type="Control"]
-anchor_right = 1.0
-anchor_bottom = 1.0
+[node name="HUD" type="Node2D"]
 script = ExtResource( 2 )
-__meta__ = {
-"_edit_use_anchors_": false
-}
 
 [node name="StarMessage" type="RichTextLabel" parent="."]
 anchor_top = 1.0

Main.gd

@@ -1,37 +1,47 @@
-extends Control
+extends Node2D
 
 export (PackedScene) var Student
 
 var HUD
+var message_has_mouse = false
 
 func _ready():
-	HUD = $CenterContainer/MarginContainer/HUD
-
+	$HUD/StarMessage.rect_size = Vector2(1024, 128)
+	$HUD/StarMessage.rect_position = Vector2(0, 768 - $HUD/StarMessage.rect_size.y)
+
 func _process(_delta):
 	if Input.is_action_pressed("ui_cancel"):
 		get_tree().quit()
 	if Input.is_action_just_pressed("ui_accept"):
-		if not HUD.message_has_mouse:
+		if not message_has_mouse:
 			show_message("")
 
+	if Input.is_action_just_pressed("ui_right"):
+		open_student()
+
 func _on_Sky_star_message(message):
 	print("_on_Star_send_message", message)
-#	if obscured:
-#		return
 	show_message(message)
 
-func show_message(msg):
-	HUD.show_message(msg)
-
-func _on_HUD_open_student():
+func open_student():
 	print("_on_HUD_open_student")
-#	obscured = true
 	show_message("")
 	var student = Student.instance()
 	add_child(student)
+	student.rect_size = Vector2(1024, 768)
 	student.connect("close", self, "_on_Student_close")
 
 func _on_Student_close():
 	print("_on_Student_close")
 	remove_child($Student)
-#	obscured = false
+
+func show_message(msg):
+	$HUD/StarMessage.scroll_to_line(0)
+	$HUD/StarMessage.text = ""
+	$HUD/StarMessage.append_bbcode("[center]" + msg + "[/center]")
+
+func _on_StarMessage_mouse_entered():
+	message_has_mouse = true
+
+func _on_StarMessage_mouse_exited():
+	message_has_mouse = false

Main.tscn

@@ -1,47 +1,36 @@
-[gd_scene load_steps=4 format=2]
+[gd_scene load_steps=6 format=2]
 
 [ext_resource path="res://Sky.tscn" type="PackedScene" id=1]
-[ext_resource path="res://HUD.tscn" type="PackedScene" id=2]
+[ext_resource path="res://assets/ilsscrp.ttf" type="DynamicFontData" id=2]
 [ext_resource path="res://Main.gd" type="Script" id=3]
+[ext_resource path="res://Student.tscn" type="PackedScene" id=4]
 
-[node name="Main" type="Control"]
-anchor_right = 1.0
-anchor_bottom = 1.0
-mouse_filter = 2
+[sub_resource type="DynamicFont" id=1]
+size = 40
+outline_color = Color( 0, 0, 0, 1 )
+font_data = ExtResource( 2 )
+
+[node name="Main" type="Node2D"]
 script = ExtResource( 3 )
-__meta__ = {
-"_edit_use_anchors_": false
-}
+Student = ExtResource( 4 )
+
+[node name="Sky" parent="." instance=ExtResource( 1 )]
+
+[node name="HUD" type="Node2D" parent="."]
 
-[node name="CenterContainer" type="CenterContainer" parent="."]
-margin_right = 40.0
-margin_bottom = 40.0
-mouse_filter = 2
+[node name="StarMessage" type="RichTextLabel" parent="HUD"]
+light_mask = 2
+anchor_top = 1.0
+anchor_right = 1.0
+anchor_bottom = 1.0
+focus_mode = 2
+custom_fonts/normal_font = SubResource( 1 )
+custom_colors/default_color = Color( 1, 1, 1, 1 )
+custom_colors/selection_color = Color( 1, 1, 0.466667, 1 )
+selection_enabled = true
 __meta__ = {
 "_edit_use_anchors_": false
 }
-
-[node name="ViewportContainer" type="ViewportContainer" parent="CenterContainer"]
-margin_right = 1024.0
-margin_bottom = 768.0
-mouse_filter = 1
-
-[node name="Viewport" type="Viewport" parent="CenterContainer/ViewportContainer"]
-size = Vector2( 1024, 768 )
-handle_input_locally = false
-render_target_update_mode = 3
-
-[node name="Sky" parent="CenterContainer/ViewportContainer/Viewport" instance=ExtResource( 1 )]
-
-[node name="MarginContainer" type="MarginContainer" parent="CenterContainer"]
-margin_left = 512.0
-margin_top = 384.0
-margin_right = 512.0
-margin_bottom = 384.0
-mouse_filter = 2
-
-[node name="HUD" parent="CenterContainer/MarginContainer" instance=ExtResource( 2 )]
-anchor_right = 0.0
-anchor_bottom = 0.0
-mouse_filter = 2
-[connection signal="star_message" from="CenterContainer/ViewportContainer/Viewport/Sky" to="." method="_on_Sky_star_message"]
+[connection signal="star_message" from="Sky" to="." method="_on_Sky_star_message"]
+[connection signal="mouse_entered" from="HUD/StarMessage" to="." method="_on_StarMessage_mouse_entered"]
+[connection signal="mouse_exited" from="HUD/StarMessage" to="." method="_on_StarMessage_mouse_exited"]

RootViewport.tscn

@@ -0,0 +1,14 @@
+[gd_scene load_steps=3 format=2]
+
+[ext_resource path="res://Viewport.gd" type="Script" id=1]
+[ext_resource path="res://Sky.tscn" type="PackedScene" id=3]
+
+[node name="Viewport" type="Viewport"]
+size = Vector2( 1024, 768 )
+handle_input_locally = false
+render_target_update_mode = 3
+physics_object_picking = true
+gui_disable_input = true
+script = ExtResource( 1 )
+
+[node name="Sky" parent="." instance=ExtResource( 3 )]

Sky.gd

@@ -7,4 +7,3 @@ func _ready():
 
 func _on_Star_send_message(star):
 	emit_signal("star_message", star.message)
-

Sky.tscn

@@ -5,21 +5,21 @@
 [ext_resource path="res://Sky.gd" type="Script" id=3]
 [ext_resource path="res://CanvasLayer.gd" type="Script" id=6]
 
-[sub_resource type="CircleShape2D" id=6]
+[sub_resource type="CircleShape2D" id=1]
 radius = 30.9577
 
-[sub_resource type="CircleShape2D" id=7]
+[sub_resource type="CircleShape2D" id=2]
 radius = 46.4871
 
-[sub_resource type="ViewportTexture" id=5]
+[sub_resource type="ViewportTexture" id=3]
 viewport_path = NodePath("StarViewport")
 
 [node name="Sky" type="Node2D"]
 script = ExtResource( 3 )
 
 [node name="Background" type="Sprite" parent="."]
-position = Vector2( 583.328, 388.202 )
-scale = Vector2( 1.45447, 1.45447 )
+position = Vector2( 512.219, 340.826 )
+scale = Vector2( 1.2767, 1.2767 )
 texture = ExtResource( 1 )
 
 [node name="StarViewport" type="Viewport" parent="."]
@@ -36,22 +36,22 @@ script = ExtResource( 6 )
 [node name="Stars" type="Node2D" parent="."]
 
 [node name="StarSpot" parent="Stars" instance=ExtResource( 2 )]
-position = Vector2( 603.869, 140.007 )
+position = Vector2( 602.455, 161.22 )
 
 [node name="CollisionShape2D" parent="Stars/StarSpot" index="0"]
-shape = SubResource( 6 )
+shape = SubResource( 1 )
 
 [node name="StarSpot2" parent="Stars" instance=ExtResource( 2 )]
-position = Vector2( 516.188, 231.931 )
+position = Vector2( 448.306, 207.889 )
 message = "The first comet after the flood was a cause of panic. It seemed that the hubris of returning to the valley was about to lead to destruction by flood again. I saw the people reach out, desperate for anything to save them. One man found one of my cousins, falling towards him as he strove. Their lives joined, and the new Sorcerer-King told the fearful he had banished the waters and demanded their allegiance."
 
 [node name="CollisionShape2D" parent="Stars/StarSpot2" index="0"]
-shape = SubResource( 7 )
+shape = SubResource( 2 )
 
 [node name="StarMask" type="Light2D" parent="."]
 visible = false
 position = Vector2( 513.359, 386.08 )
-texture = SubResource( 5 )
+texture = SubResource( 3 )
 mode = 3
 
 [editable path="Stars/StarSpot"]

StarSpot.gd

@@ -12,6 +12,7 @@ var highlight = null
 # Called when the node enters the scene tree for the first time.
 func _ready():
 	randomize()
+	set_process_unhandled_input(true)
 	highlight = Color.from_hsv(randf(), 0.6, 1, 1)
 
 	if get_parent():
@@ -33,3 +34,9 @@ func _on_StarSpot_mouse_entered():
 func _on_StarSpot_mouse_exited():
 	modulate = initial_modulation
 	pointed_at = false
+
+#func _input(event):
+#	print("Star Spot event: ", event)
+
+#func _unhandled_input(event):
+#	print("Star Spot unhandled event: ", event)

Student.tscn

@@ -10,6 +10,7 @@ size = 32
 font_data = ExtResource( 3 )
 
 [node name="Student" type="MarginContainer"]
+light_mask = -2147483646
 anchor_right = 1.0
 anchor_bottom = 1.0
 margin_bottom = 6.10352e-05
@@ -21,6 +22,7 @@ __meta__ = {
 Button = ExtResource( 4 )
 
 [node name="ColorRect" type="ColorRect" parent="."]
+light_mask = 2
 margin_right = 1024.0
 margin_bottom = 768.0
 color = Color( 0.145098, 0.129412, 0.0196078, 1 )
@@ -29,10 +31,12 @@ color = Color( 0.145098, 0.129412, 0.0196078, 1 )
 dialog_file = "res://student.json"
 
 [node name="VBoxContainer" type="VBoxContainer" parent="."]
+light_mask = 2
 margin_right = 1024.0
 margin_bottom = 768.0
 
 [node name="RichTextLabel" type="RichTextLabel" parent="VBoxContainer"]
+light_mask = 2
 margin_right = 1024.0
 margin_bottom = 768.0
 focus_mode = 2

Viewport.gd

@@ -0,0 +1,12 @@
+extends Viewport
+
+
+# Declare member variables here. Examples:
+# var a = 2
+# var b = "text"
+
+func _ready():
+	pass
+#	set_process_input(true)
+#	set_process_unhandled_input(true)
+

ViewportContainer.gd

@@ -0,0 +1,17 @@
+extends ViewportContainer
+
+
+# Declare member variables here. Examples:
+# var a = 2
+# var b = "text"
+
+func _on_ViewportContainer_mouse_entered():
+	print("_on_ViewportContainer_mouse_entered")
+
+func _input( event ):
+	if event is InputEventMouse:
+		var mouseEvent = event.duplicate()
+		mouseEvent.position = get_global_transform().xform_inv(event.global_position)
+		$Viewport.unhandled_input(mouseEvent)
+	else:
+		$Viewport.unhandled_input(event)