Hollywood special effects pioneer ARTHUR WIDMER died of cancer last week (28MAY06). He was 92. Widmer won an Academy Award last year (05) for lifetime achievement in recognition of his work in developing ultra violet and "blue screen" special effects processes. Working for Warner Bros in the 1950s, Widmer developed the Ultra Violet Traveling Matte process, an early version of what would become known as blue screen, in which two different images shot at different times and places could be combined into one. He left the studio in 1964 to design and build the optical department for Universal Studios, where he continued the development of blue screen and other visual effects until his retirement in 1979.