diff --git a/src/UI/Dialogs/WindowOpacityDialog.gd b/src/UI/Dialogs/WindowOpacityDialog.gd
index b72f69bc5..8ab8230cf 100644
--- a/src/UI/Dialogs/WindowOpacityDialog.gd
+++ b/src/UI/Dialogs/WindowOpacityDialog.gd
@@ -1,10 +1,10 @@
 extends AcceptDialog
 
+var main_canvas := Global.control.find_child("Main Canvas", true, false)
+
 @onready var slider := $VBoxContainer/ValueSlider as ValueSlider
 @onready var fullscreen_warning := $VBoxContainer/FullscreenWarning as Label
 
-var main_canvas := Global.control.find_child("Main Canvas", true, false)
-
 
 func _ready() -> void:
 	if main_canvas is FloatingWindow:  ## If it's shifted to a window then get the content
diff --git a/src/UI/UI.gd b/src/UI/UI.gd
index 71c4c1713..105e46511 100644
--- a/src/UI/UI.gd
+++ b/src/UI/UI.gd
@@ -1,9 +1,10 @@
 extends Panel
 
+var shader_disabled := false
+var transparency_material: ShaderMaterial
+
 @onready var main_canvas_container := find_child("Main Canvas") as Container
 
-var shader_moved := false
-var transparency_material: ShaderMaterial
 
 func _ready() -> void:
 	transparency_material = material
@@ -14,13 +15,12 @@ func _ready() -> void:
 func _re_configure_shader():
 	await get_tree().process_frame
 	if get_window() != main_canvas_container.get_window():
-		main_canvas_container.material = transparency_material
 		material = null
-		shader_moved = true
+		shader_disabled = true
 	else:
-		if shader_moved:
+		if shader_disabled:
 			material = transparency_material
-			shader_moved = false
+			shader_disabled = false
 
 
 func _on_main_canvas_item_rect_changed() -> void: