diff --git a/sim/main.lua b/sim/main.lua
index 16f6c0a..66d36d4 100644
--- a/sim/main.lua
+++ b/sim/main.lua
@@ -314,7 +314,9 @@ while 1 do
 	end
 	
 	if time-lastfxtime >= OPT_FX_TIME then
-		sim:sendfxupdate()
+		if OPT_FX_UPDATES then
+			sim:sendfxupdate()
+		end
 		sim:sendcallbacks()
 		lastfxtime = time
 	end
diff --git a/sim/simulation.lua b/sim/simulation.lua
index 9b1593a..7dabfa3 100644
--- a/sim/simulation.lua
+++ b/sim/simulation.lua
@@ -301,25 +301,17 @@ function Simulation:sendfxupdate()
 	for k, group in pairs(self.groupfxqueue) do
 		if group.state ~= group.fxstate then
 			group.fxstate = group.state
-
+			
 			local data = bool_to_int[group.state]
-
-			if OPT_FX_UPDATES then
-				for i, wire in pairs(group.wires) do
-					data = data .. "\t" .. wire.objref
-				end
-			else
-				for i, wire in pairs(group.wires) do
-					if wire.isvisual then
-						data = data .. "\t" .. wire.objref
-					end
-				end
+			
+			for i, wire in pairs(group.wires) do
+				data = data .. "\t" .. wire.objref
 			end
-
+			
 			client:send("WU\t" .. data .. "\n")
 		end
 	end
-
+	
 	self.groupfxqueue = {}
 end