Menu Background Map - Valve Developer Community
For Half-Life 2, this file can be found at half-life 2hl2cfgconfig.cfg and can be opened in any text editor. Replacing Half-Life 2 background maps If you want to replace the background maps built into Half-Life 2 with maps of your own creation, simply create the background .BSP and .VTF and .VMT material files using the above steps, and ...