...
    internal virtual Tile TileAt(Int32 x, Int32 y)
    {
        // The default way for a realm to work is by wrapping. This method can be overridden if other methods are desired.
        while (x < 0)
            x += this.width;
        while (x >= this.width)
            x -= this.width;

        if (y < 0) // This is above the top most tiles, should default to empty blocks of air.
            return new Tile() { BackType = TileBackType.None, BaseType = TileBaseType.Air, OverType = TileOverType.None };
        if (y >= this.Height) // This is below ground, on the lowest levels. Defaults to Stone for now.
            return new Tile() { BackType = TileBackType.None, BaseType = TileBaseType.Stone, OverType = TileOverType.None };

        return this.Tiles[x, y];
    }
...