for (int row = 0; row < Nz; row++)
    for (int column = 0; column < Nx; column++)
    {
        Color cell_color = GetColor(row, column, tgs, my_texture, myCells);
        set.Add(cell_color);
        tgs.CellToggleRegionSurface(currentIndex, true, cell_color, true);
    }