Winning the Archibald Prize as Guido Maestri did in 2009 would be a defining moment in most artist’s careers, but he is quick to cite physical immersion in the landscape as revolutionary to his painting practice. It’s easy to gloss over the history of plein-air as a European tradition, born of gentle grasses and mild sunlight. Practiced in Australia, away from the slip of green coastline, plein-air demands rigor of vast dimensions.