Turkish visual artist Garip Ay demonstrating one of the oldest forms of painting from Turkey known as Ebru. A pattern emerges after a fine wire comb is "dragged" on a paint-coated surface of water. The pattern is then printed by floating a sheet of paper on the water's surface. This ancient technique of painting produces a marbling effect that is used as a decorative motif in books and binders. Ay's painting workshop is one of the many offerings in this year's Visual SG, South-east Asia's signature Visualisation Festival now on until July 31 at the Singapore Science Centre.