(composite-gobo, cookie) A thin metal plate etched to produce a design which can then be projected by a profile spotlight (E.g. Foliage, Windows). The image can be used soft focus to add texture, rather than a defined image. A number of composite gobos in different coloured lanterns can, with careful focusing, produce a coloured image (e.g. a stained glass window). Greater detail can be achieved using a glass gobo. The original use of the word GOBO came from the early days of Hollywood. When the Director of Photography wanted daylight excluded from some area of the set, he'd say "GO BlackOut". Loads of people would run around putting black material between the sun and the set. It eventually evolved into other stuff that goes in front of lights and now most commonly (in the UK at least), refers to patterns in profiles. In the US TV/Film industry, a Gobo is a piece of material used to mask or block light and a Cookie (short for Cucaloris(from the Greek kukaloris the breaking up of light)) is the same as a UK Gobo.