In some of the car interior scenes the colour-separation overlay (CSO) backgrounds were omitted, leaving the blue screen behind the characters. As Paul Vanezis explained in an interview, "they didn't put a background in there it wasn't lit properly. There wasn't enough blue in it to key it, or yellow or green or whatever it was. It was shot wrong. It shouldn't have been shot in the studio and it shouldn't have been shot on xchrome. These days with modern technology you could easily key it... easily, but it wouldn't look right."