Specific information on how much Freda and Bava directed the film differ between interviews and recollections. Freda noted with an interview with Luigi Cozzi in 1971 that he "left it when there were just two days of shooting left. I did shoot it yes, but it's Bava's type of film. I don't enclose it in my body of work. The only thing I remember with pleasure about it are the statues that decorated the sets: I sculpted them myself." Bava described "Caltiki – The Immortal Monster" as "my very first film", while noting that Freda had fled the set "because everything was falling to pieces. I managed to carry it out, patching it up here and there". Cozzi commented on his interview with Freda in 2004, stating that his own words were misinterpreted and that "the truth is only one: the director of "Calitiki il mostro immortale" is Riccardo Freda, full stop. Mario Bava did take care of the cinematography, the special effects and directed the scenes with the miniatures (that is, mostly the tanks...), and in addition to that he filmed some shots of soldiers with flame throwers. That's all, and of course it cannot be enough to say that Bava directed that movie." Cozzi also stated that Bava spoke about the film, stating that "I did not direct "Caltiki". The director of that movie is Freda. Only at a certain point, after principal shooting ended, Freda started editing the picture and then he had a big argument with the producer [...] Then Freda walked out." Bava's statement from Cozzi then noted that Bava finished some special effects shot, scenes with soldiers with flame throwers for the ending of the film and declared "that does not mean I was the director of "Caltiki": that is a Riccardo Freda film." According to Bava's biographer Tim Lucas, Freda's walk-off left "two or three weeks of filming", leaving Bava to shoot over 100 special effects shots for a 76-minute long production.