UnityToVTF

Automatically converts texture files from Unity to Hammer VTF on import.

Requires VTFCmd.exe, the source for which can be found here.

When a Texture2D file gets imported into a vtfexport folder it gets automatically sent to an hl2/materials/ folder found in your install of Source SDK 2013 Singleplayer. You can also change it to search for Half-Life 2 or any other Source game, just change the game name at

        // name has to match the steamapps/common folder name.
        if (!TryGetGame("Source SDK Base 2013 Singleplayer"))
        {
            Debug.LogError("Could not find Source SDK Base 2013.");
            return;
        }