private void OnMouseDown()
    {
        blockRenderer = new MarchRenderer();
        Mesh mesh = blockRenderer.generateMesh(blockData, isoSurfaceLevelOverride);

        meshFilter.sharedMesh   = mesh;
        meshCollider.sharedMesh = mesh;
    }
    // Use this for initialization
    void Start()
    {
        blockRenderer = new MarchRenderer();
        Mesh mesh = blockRenderer.generateMesh(blockData);

        meshFilter.sharedMesh   = mesh;
        meshCollider.sharedMesh = mesh;
    }