Film authority Roy Kinnard says, “In examining the plethora of 1950s science-fiction movies which deal with the theme of mans’ journeying to other worlds in order to advance his own knowledge, George Pal’s production of "Conquest of Space" stands head and shoulders above the others... a ... genre overburdened with cheap and shoddy productions that are all too deserving of scorn, "Conquest of Space" rises above the tide of mediocrity. ... [The special visual effects in "Conquest" ... are outstanding for their time ... and they are the well-tailored work of one of Hollywood’s most gifted craftsmen, John P. Fulton. Besides the massive, graceful spacecraft shown in this film, it was Fulton who was responsible for parting the Red Sea in the 1956 version of "The Ten Commandments". ... It is true that the blue screen mattes in "Conquest" are crude our perspective ... but this is hardly a technical flaw unique to this picture. Many productions of the 50s had difficulty with blue screen work, even multi-million dollar spectaculars like "Ben-Hur"”. Furthermore, science fiction film authority Thomas Kent Miller states, "Blue screen was used extensively in this epic ["The Ten Commandments"], and the blue line fringes are always quite evident throughout the movie. In fact, Fulton’s remarkable and iconic Parting of the Red Sea sequence is a great hodgepodge of intersecting blue fringe lines".