Complex sentence: During the late 1980s and early 1990s, KGMC adopted a very sophisticated on-air look for a mid-size market independent station, using CGI graphics of near network-quality.
Split into simpler sentences: During the late 1980s and early 1990s, KGMC adopted a very slick on-air look by middle-market independent standards. It was known for using CGI graphics of near network-quality.