diff --git a/material_maker/panels/preview_3d/post_process_menu.gd b/material_maker/panels/preview_3d/post_process_menu.gd
index 67cfc1545..1a743def1 100644
--- a/material_maker/panels/preview_3d/post_process_menu.gd
+++ b/material_maker/panels/preview_3d/post_process_menu.gd
@@ -94,14 +94,14 @@ func expand_panel_width() -> void:
 			if v_scroll.visible else custom_min_width)
 
 func is_section_not_default(section : String):
-	var not_default := true
+	var not_default : bool = true
 	for config in mm_globals.DEFAULT_CONFIG.keys():
-		var key := "ui_3d_preview_" + section
+		var key : String = "ui_3d_preview_" + section
 		if key in config and "enable" not in config:
 			not_default = not_default and (mm_globals.get_config(config) == mm_globals.DEFAULT_CONFIG[config])
 	return not_default
 
-func _process(_delta: float) -> void:
+func _process(_delta : float) -> void:
 	$ScrollContainer/VBoxContainer/TonemapHeader/ResetTonemapSection.disabled = is_section_not_default("tonemap")
 	$ScrollContainer/VBoxContainer/GlowHeader/ResetGlowSection.disabled = is_section_not_default("glow")
 	$ScrollContainer/VBoxContainer/AdjustmentHeader/ResetAdjustmentSection.disabled = is_section_not_default("adjustment")
@@ -466,3 +466,6 @@ func _on_far_transition_value_changed(value: Variant) -> void:
 func _on_near_transition_value_changed(value: Variant) -> void:
 	camera_attributes.dof_blur_near_transition = value
 	mm_globals.set_config(SETTINGS_PREVIEW_DOF_NEAR_TRANSITION, value)
+
+func _on_visibility_changed() -> void:
+	set_process(is_visible_in_tree())
diff --git a/material_maker/panels/preview_3d/preview_3d.tscn b/material_maker/panels/preview_3d/preview_3d.tscn
index ca6aa9e00..0f2e542d8 100644
--- a/material_maker/panels/preview_3d/preview_3d.tscn
+++ b/material_maker/panels/preview_3d/preview_3d.tscn
@@ -874,6 +874,7 @@ float_only = true
 [connection signal="item_selected" from="MainMenu/HBox/ExportMenu/ExportMenuPanel/VBoxContainer/GenerateMapsSection/ExportFile/BoxContainer/MapFileType" to="MainMenu/HBox/ExportMenu/ExportMenuPanel" method="_on_map_file_type_item_selected"]
 [connection signal="pressed" from="MainMenu/HBox/ExportMenu/ExportMenuPanel/VBoxContainer/GenerateMapButton" to="MainMenu/HBox/ExportMenu/ExportMenuPanel" method="_on_generate_map_button_pressed"]
 [connection signal="minimum_size_changed" from="MainMenu/HBox/PostProcessMenu/PostProcessPanel" to="MainMenu/HBox/PostProcessMenu/PostProcessPanel" method="_on_minimum_size_changed"]
+[connection signal="visibility_changed" from="MainMenu/HBox/PostProcessMenu/PostProcessPanel" to="MainMenu/HBox/PostProcessMenu/PostProcessPanel" method="_on_visibility_changed"]
 [connection signal="minimum_size_changed" from="MainMenu/HBox/PostProcessMenu/PostProcessPanel/ScrollContainer" to="MainMenu/HBox/PostProcessMenu/PostProcessPanel" method="_on_scroll_container_minimum_size_changed"]
 [connection signal="minimum_size_changed" from="MainMenu/HBox/PostProcessMenu/PostProcessPanel/ScrollContainer/VBoxContainer" to="MainMenu/HBox/PostProcessMenu/PostProcessPanel" method="_on_v_box_container_minimum_size_changed"]
 [connection signal="toggled" from="MainMenu/HBox/PostProcessMenu/PostProcessPanel/ScrollContainer/VBoxContainer/TonemapHeader/Tonemap" to="MainMenu/HBox/PostProcessMenu/PostProcessPanel" method="_on_tonemap_toggled"]