20 Martin Place, Sydney, Visual Mock Up by G.James Glass and Aluminium20 Martin Place, Sydney, Visual Mock Up by G.James Glass and Aluminium Published October 29, 2013 at 1620 × 1080 in 20 Martin Place, Sydney, Visual Mock Up by G.James Glass and Aluminium20 Martin Place, Sydney, Visual Mock Up by G.James Glass and Aluminium ← Previous Next → Visual Mock Up. Because of the complexity of the project, this visual mock up will incorporate alternative solutions to various elements of the building, so they can be compared in situ.