His method of working is different from the traditional approach. Normally artist would work from light to dark but he finds it natural to work in reverse from dark to light. Working exclusively in oils, he always starts with a completely black canvas and adds highlights until he finds the balance in contrast. He works hard at composition and geometry emphasising light and shadow. He also likes titles to give clues: there is always a strong sense of narrative. Marks hugely successful musical series was a complete sell-out with his former publishers and his originals and limited editions often sold within a few days of issue. Due to the painstaking attention to detail, original paintings are in short supply leading to high demand.