green screen<\/a> was a much-used-but-incredibly-painful, process. Green screens were made of plastic, they were very shiny, and they would often develop creases. The only option was to light them with tungsten or fluorescent light, which spilled green everywhere and clashed with skin tones. Once you got footage into post-production, you had to overlay multiple different keyers, with different ranges, as well as use garbage mattes to finesse the shot. You did all this difficult work to get something usable, and you usually had to manually rotoscope out things that went wrong. It was hard, finicky work, and it wasn’t something you looked forward to doing.<\/p>\n