public static Block[, ,] CreateLandscape(int chunkX, int chunkZ)
{
    Block[, ,] blocks = new Block[Settings.CHUNK_SIZE, Settings.WORLD_HEIGHT, Settings.CHUNK_SIZE];
    ChunkNoise noise = new ChunkNoise(seed: 12345);

    // Calculate heightmap
    float[,] heightmap = new float[Settings.CHUNK_SIZE, Settings.CHUNK_SIZE];
    noise.FillMap2D(heightmap, chunkX, chunkZ, octaves: 5, startFrequency: .03f, startAmplitude: 5);

    // Fill chunk with blocks
    for (int localX = 0; localX < Settings.CHUNK_SIZE; localX++)
    {
        for (int localZ = 0; localZ < Settings.CHUNK_SIZE; localZ++)
        {
            // Create ground
            int height = Mathf.RoundToInt(Settings.SEA_LEVEL + heightmap[localX, localZ]);

            for (int y = 0; y < height; y++)
            {
                blocks[localX, y, localZ] = Block.Stone;
            }

            // Create mountains
            int worldX = localX + chunkX * Settings.CHUNK_SIZE;
            int worldZ = localZ + chunkZ * Settings.CHUNK_SIZE;

            for (int y = height; y < Settings.WORLD_HEIGHT; y++)
            {
                float noiseValue3D = noise.GetValue3D(worldX, y, worldZ, octaves: 6, startFrequency: .05f, startAmplitude: 1);
                if (noiseValue3D > 0)
                {
                    blocks[localX, y, localZ] = Block.Sand;
                }
                else
                {
                    blocks[localX, y, localZ] = Block.Empty;
                }
            }
        }
    }

    return blocks;
}