...
    public Planet(Int32 seed)
    {
        this.levels = new List<Level>();
        this.Seed = seed;
        this.random = new Random(this.Seed);

        var width = 512;
        var height = 512;

        var module = new ImplicitFractal(FractalType.FractionalBrownianMotion, BasisType.Gradient, InterpolationType.Quintic);
        module.Seed = this.Seed;
        module.Octaves = 1;
        module.Frequency = 2.00 + 2 * (width / 256.00);
        var cache = new ImplicitCache(module);

        var values = new Double[width, height];
        var sw = Stopwatch.StartNew();
        Mapping.Map2D(MappingMode.SeamlessXY, values, cache, new MappingRanges(), 0.00);
        Console.WriteLine("Generated in : " + sw.Elapsed.TotalSeconds.ToString("0.00") + "s - " + (sw.Elapsed.TotalMilliseconds / (width * height)).ToString("0.00") + "ms per tile");
        var level = new Level(width, height);
        for (var y = 0; y < level.TilesHigh; y++)
        {
            for (var x = 0; x < level.TilesWide; x++)
            {
                if (values[x, y] > 0.30)
                    level.SetTile(x, y, new Tile(TileBackType.Rock, TileBaseType.Iron));
                else if (values[x, y] > 0.13)
                    level.SetTile(x, y, new Tile(TileBackType.Rock, TileBaseType.Rock));
                else if (values[x, y] > 0.08)
                    level.SetTile(x, y, new Tile(TileBackType.Gravel, TileBaseType.Air));
                else if (values[x, y] > 0.00)
                    level.SetTile(x, y, new Tile(TileBackType.Sand, TileBaseType.Air));
                else if (values[x, y] > -0.30)
                    level.SetTile(x, y, new Tile(TileBackType.Dirt, TileBaseType.Air));
                else
                    level.SetTile(x, y, new Tile(TileBackType.Water, TileBaseType.Air));
            }
        }
        this.levels.Add(level);
    }
...