Reminds me of when I was growing up (not the same thing as maturing) watching Lone Ranger movies on b&w TV with the family, and commenting on the double shadows of equal darkness during the "evening" camp scenes - an obvious studio setup. My dad said "who would ever notice such a thing?" Don't know for sure if that's what caused him to give me my first camera for a graduation gift, or if it was just so he could get his little folding Kodak back (616 film IIRC). Oh, and also the old western horseback chases done midday with gross underexposure to simulate moonlight scenes - ah, those were the days.
Didn't I read or hear somewhere that they used really strong red filters when shooting "night" scenes during the day?