/* Initialise a new instance of the texture manager if one does not exist */
 public static void Initialise(Game game)
 {
     if (instance == null)
     {
         instance = new textureManager(game);
     }
 }
 /* Initialise a new instance of the texture manager if one does not exist */
 public static void Initialise(Game game)
 {
     if (instance == null)
     {
         instance = new textureManager(game);
     }
 }