Index: binaries/data/mods/public/gui/pregame/mainmenu.js
===================================================================
--- binaries/data/mods/public/gui/pregame/mainmenu.js
+++ binaries/data/mods/public/gui/pregame/mainmenu.js
@@ -60,10 +60,9 @@
 	for (let i = 0; i < g_BackgroundLayerset.length; ++i)
 	{
 		let guiObj = Engine.GetGUIObjectByName("background[" + i + "]");
-
 		let screen = guiObj.parent.getComputedSize();
 		let h = screen.bottom - screen.top;
-		let w = h * 16/9;
+		let w = screen.right - screen.left;
 		let iw = h * 2;
 
 		let offset = g_BackgroundLayerset[i].offset((Date.now() - g_T0) / 1000, w);