If I were moving to Australia and I wanted my house to look like an Italian villa, I would probably hire YSG Studio on the basis of these images of their three-story renovation in Sydney that the studio has nicknamed Black Diamond. YSG's Sydney-based client wanted their new home to evoke a boutique hotel, but to our mind, there's more "historical house museum outside Milan" here, what with the glass bricks, port windows, ceiling plaster, travertine, banana bark, zellige tiles, raffia, smoked…