add rain sound + add time to screen

core/daynight/edge_detection_compositor.gd

@@ -10,8 +10,11 @@ var parameter_storage_buffer := RID()
 func _init() -> void:
 	effect_callback_type = CompositorEffect.EFFECT_CALLBACK_TYPE_POST_OPAQUE
 	rd = RenderingServer.get_rendering_device()
+	if rd == null:
+		return
+
 	RenderingServer.call_on_render_thread(_initialize_compute)
-	
+
 	var data := PackedFloat32Array()
 	data.resize(20)
 	data.fill(0)
@@ -24,7 +27,7 @@ func _init() -> void:
 # alerts us we are about to be destroyed.
 func _notification(what: int) -> void:
 	if what == NOTIFICATION_PREDELETE:
-		if shader.is_valid():
+		if rd != null and shader.is_valid():
 			# Freeing our shader will also free any dependents such as the pipeline!
 			rd.free_rid(shader)