Though Wong admits to being controlling, and oversees every aspect of the film making process, he has formed several long-lasting partnerships and close collaborators. In 2013 he said, "It is always good to work with a very regular group of people because we know how high we can fly and what are the parameters, and it becomes very enjoyable." Two men have been instrumental in developing and achieving his aesthetic: production designer William Chang and cinematographer Christopher Doyle. Chang has worked on every Wong film and is a trusted confidant, responsible for all set design and costuming. Doyle photographed seven of his projects, all from "Days of Being Wild" to "2046". Stephen Schneider writes that he deserves "much credit" in Wong's success, as his "masterful use of light and colour renders every frame a work of art". Wong's other regular colleagues include writer-producer Jeffrey Lau, producer Jacky Pang, and assistant director Johnnie Kong.