Tall actor José Ferrer was transformed into the short artist Toulouse-Lautrec by the use of camera angles, makeup, costume, concealed pits and platforms and short body doubles. Ferrer also used a set of special knee pads of his own design which allowed him to walk on his knees with his lower legs strapped to his upper body. He suffered extreme pain and could only use them for short periods of time. The cane he used in most of his scenes was of absolute necessity. This fact was covered in a LIFE magazine story in 1952.
A famous story came up during the filming was that after Technicolor came out with the dailies according to legendary cinematographer Oswald Morris' specifications, the lab management confronted Morris and John Huston over the dailies claiming that it was faulty. Huston and Morris viewed it in a theater at which point Huston allegedly turned to Morris and said, "What do you think, Os?" To which he replied, "Exactly as I wanted it." Huston replied, "Me too." They then turned to the Technicolor management with, "Gentlemen, thank you and f**k you!" After the film was released, it became a personal favorite of Technicolor inventor Herbert Kalmus.