In 1977, Ken Adam was working as Production Designer for the James Bond film, “The Spy Who Loved Me.” One of the sets included the villain’s secret lair that was located inside of an enormous tanker ship. Adam struggled with lighting the massive set, and called in a favor from his old boss… Stanley Kubrick. Under an agreement of total secrecy, Kubrick was snuck onto the empty set, where he spent 4 hours setting lighting and advising Ken Adam.
https://youtu.be/MFI-UvmxN1Q