 To relieve the monolithic solidity of the steel walls, the three conceived the idea of openings contoured to suggest shadows cast by the half-figures.After several attempts to shine bright lights on the half-figures to create actual shadows, Mannheimer drew the desired contours in chalk on the steel walls, which were laser cut and smoothed to create the cut-outs.The total cost of creating and installing the memorial, including two markers with bronze plaques, approached $200,000.