Throughout the climactic confrontation as Carmody and Mieh Yang sit next to each other, Mieh Yang's bald head shifts repeatedly between sunshine and shadow.
At the very beginning, when Father O'Shea approaches the mission, he is supposedly riding through a thunderstorm. But the sun is brightly shining all through the scene, revealing that the "rain" is contrived by crew members, and the "thunder" is added by Foley artists.
In the flashback scenes all the Chinese horsemen are riding non-Asian horses with American western-style saddles.
A dead man moves his hands after Bogie places one on top of the other.