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Sometimes buildings need a fresh set of clothes. Perhaps not really clothes, and maybe not even something physical, but the surface of a building can often be changed much more quickly and drastically than the other components. This interplay between permanent and temporary, rigid and fluid, and solid and ephemeral creates the tension that can bring a building alive. Last week in Sydney, 59 Productions transformed their Opera House into a shattered orb of shape-shifting light in support of the annual outdoor art fest Vivid LIVE, a spectacular projection titled "Lighting The Sails." The same team has provided visuals for both the 2012 Opening Ceremony of the London Olympics, and for Jonsi's live tour. The projections must be exact so that they line up with the facets and do not bleed over the edges, becoming one with the building. Because of this trick proposition, digital software is required, but the real magic is made in physical models. The group made a 3D printed model, and then a series of casts, in order to work out the projections. "We had a number of casts made ...