What is a cucoloris? This lighting grate, which also goes by such names as cookie, gobo, and dapple sheet, is used in photography to cast a dramatic shadow. There are lots of spellings of this word, including cuculoris, kookaloris, cookaloris, and cucalorus. The name may have to do with George Cukor, an early pioneer of the tool in old Hollywood. This is part of a complete episode.