Visibility rect only shown when a GPUParticle2D is selected to reduce visual clutter in scenes with a lot of Particle nodes.

editor/plugins/gpu_particles_2d_editor_plugin.cpp

@@ -57,6 +57,27 @@ void GPUParticles2DEditorPlugin::_file_selected(const String &p_file) {
 	emission_mask->popup_centered();
 }
 
+void GPUParticles2DEditorPlugin::_selection_changed() {
+	List<Node *> selected_nodes = editor->get_editor_selection()->get_selected_node_list();
+
+	if (selected_particles.is_empty() && selected_nodes.is_empty()) {
+		return;
+	}
+
+	for (GPUParticles2D *SP : selected_particles) {
+		SP->set_show_visibility_rect(false);
+	}
+	selected_particles.clear();
+
+	for (Node *P : selected_nodes) {
+		GPUParticles2D *selected_particle = Object::cast_to<GPUParticles2D>(P);
+		if (selected_particle != nullptr) {
+			selected_particle->set_show_visibility_rect(true);
+			selected_particles.push_back(selected_particle);
+		}
+	}
+}
+
 void GPUParticles2DEditorPlugin::_menu_callback(int p_idx) {
 	switch (p_idx) {
 		case MENU_GENERATE_VISIBILITY_RECT: {
@@ -334,6 +355,7 @@ void GPUParticles2DEditorPlugin::_notification(int p_what) {
 		menu->get_popup()->connect("id_pressed", callable_mp(this, &GPUParticles2DEditorPlugin::_menu_callback));
 		menu->set_icon(menu->get_theme_icon(SNAME("GPUParticles2D"), SNAME("EditorIcons")));
 		file->connect("file_selected", callable_mp(this, &GPUParticles2DEditorPlugin::_file_selected));
+		EditorNode::get_singleton()->get_editor_selection()->connect("selection_changed", callable_mp(this, &GPUParticles2DEditorPlugin::_selection_changed));
 	}
 }
 

editor/plugins/gpu_particles_2d_editor_plugin.h

@@ -56,6 +56,7 @@ class GPUParticles2DEditorPlugin : public EditorPlugin {
 	};
 
 	GPUParticles2D *particles;
+	List<GPUParticles2D *> selected_particles;
 
 	EditorFileDialog *file;
 	EditorNode *editor;
@@ -79,6 +80,7 @@ class GPUParticles2DEditorPlugin : public EditorPlugin {
 	void _menu_callback(int p_idx);
 	void _generate_visibility_rect();
 	void _generate_emission_mask();
+	void _selection_changed();
 
 protected:
 	void _notification(int p_what);

editor/plugins/node_3d_editor_gizmos.cpp

@@ -2579,7 +2579,7 @@ void CPUParticles3DGizmoPlugin::redraw(EditorNode3DGizmo *p_gizmo) {
 GPUParticles3DGizmoPlugin::GPUParticles3DGizmoPlugin() {
 	Color gizmo_color = EDITOR_DEF("editors/3d_gizmos/gizmo_colors/particles", Color(0.8, 0.7, 0.4));
 	create_material("particles_material", gizmo_color);
-	gizmo_color.a = 0.1;
+	gizmo_color.a = MAX((gizmo_color.a - 0.2) * 0.02, 0.0);
 	create_material("particles_solid_material", gizmo_color);
 	create_icon_material("particles_icon", Node3DEditor::get_singleton()->get_theme_icon(SNAME("GizmoGPUParticles3D"), SNAME("EditorIcons")));
 	create_handle_material("handles");

scene/2d/gpu_particles_2d.cpp

@@ -170,6 +170,13 @@ void GPUParticles2D::set_trail_section_subdivisions(int p_subdivisions) {
 	update();
 }
 
+#ifdef TOOLS_ENABLED
+void GPUParticles2D::set_show_visibility_rect(bool p_show_visibility_rect) {
+	show_visibility_rect = p_show_visibility_rect;
+	update();
+}
+#endif
+
 bool GPUParticles2D::is_trail_enabled() const {
 	return trail_enabled;
 }
@@ -452,7 +459,7 @@ void GPUParticles2D::_notification(int p_what) {
 		RS::get_singleton()->canvas_item_add_particles(get_canvas_item(), particles, texture_rid);
 
 #ifdef TOOLS_ENABLED
-		if (Engine::get_singleton()->is_editor_hint() && (this == get_tree()->get_edited_scene_root() || get_tree()->get_edited_scene_root()->is_ancestor_of(this))) {
+		if (show_visibility_rect) {
 			draw_rect(visibility_rect, Color(0, 0.7, 0.9, 0.4), false);
 		}
 #endif
@@ -588,6 +595,9 @@ GPUParticles2D::GPUParticles2D() {
 	set_speed_scale(1);
 	set_fixed_fps(30);
 	set_collision_base_size(collision_base_size);
+#ifdef TOOLS_ENABLED
+	show_visibility_rect = false;
+#endif
 }
 
 GPUParticles2D::~GPUParticles2D() {

scene/2d/gpu_particles_2d.h

@@ -58,7 +58,9 @@ private:
 	bool local_coords;
 	int fixed_fps;
 	bool fractional_delta;
-
+#ifdef TOOLS_ENABLED
+	bool show_visibility_rect;
+#endif
 	Ref<Material> process_material;
 
 	DrawOrder draw_order;
@@ -81,7 +83,6 @@ protected:
 	static void _bind_methods();
 	virtual void _validate_property(PropertyInfo &property) const override;
 	void _notification(int p_what);
-
 	void _update_collision_size();
 
 public:
@@ -102,6 +103,10 @@ public:
 	void set_trail_sections(int p_sections);
 	void set_trail_section_subdivisions(int p_subdivisions);
 
+#ifdef TOOLS_ENABLED
+	void set_show_visibility_rect(bool p_show_visibility_rect);
+#endif
+
 	bool is_emitting() const;
 	int get_amount() const;
 	double get_lifetime() const;