Mather created digital matte paintings for ILM on four Star Wars films in the '90s as well as dozens of matte paintings and digital matte paintings on the adventure series The Young Indiana Jones Chronicles (1992-1993) and its following film productions between 1994 and 2008. In 1990 he won an Emmy Award for Outstanding Achievement in Special Visual Effects for his work on the television thriller By Dawn's Early Light, shared with Craig Barron, Michael Pangrazio, and Charlie Mullen. In 1996 he earned an Emmy Award nomination for Outstanding Individual Achievement in Special Visual Effects for his work on the television movie The Adventures of Young Indiana Jones: Attack of the Hawkmen, shared with Eric Chauvin.