Goofs

During action scenes, the goggles Paul and the Fremen wear go from being on during wider shots, to being nowhere to be seen in closeups. One might think the visors on the goggles are retractable, but there are several shots in which Paul will have his goggles pulled down around his neck.

During the final exchange between Paul and Feyd-Rautha as a bloodied Feyd is slowly pushing his blade towards Paul, there is a brief closeup of Feyd without blood on his face. His face was previously bloodied due to an earlier blow.

When Paul is running to jump on the worm on his test, he doesn't wear goggles. Once on the worm, he has them.

Before the start of the fight in the arena, Feyd-Rautha faces his uncle inside a shadow that has a curved shape to his right. As he turns around and retraces his steps and the plane opens, the shadows have changed and the curved shape is still to his right and in a different position.

When Gurney and Paul first talk and Gurney mentions Paul's new name of Muad'Dib, Gurney's arm alternates between being around Paul and not around him depending on the camera angle.

One of the pillars of Dune's universe is the absence of any type of advanced computers, summarized in the quasi-religious principle of "Thou shalt not make a machine in the likeness of a human mind." The Harkonnen operators are using systems that merely relay information from one place to another, much like the way cameras sent images of the first moon landing back to Earth. It would be easier with the processing units existing in today's world, but computers are not necessary to relay the information from vehicles in the field to controllers at a base. Multiple wars were fought using aircraft, naval vessels, and tanks during the second half of the 20th century in which similar field information went back and forth without the use of computers.

During the first extractor attack, a number of Fremen attack the Sardaukar soldiers on foot with numerous casualties. Once the ornithopter was shot down, the extractor was destroyed with long-distance weapons, rendering the Fremen land attack and numerous losses pointless.

Historically, ill-advised attacks and pointless losses occur in every war.

When the first extractor lands on the desert, there is already sand above its caterpillars before they start rolling on the ground. This was presumably left over from when it was last used; on a desert planet, vehicles are unlikely to be jet-washed between operations.

Lady Jessica is the daughter of Baron Vladimir Harkonnen. Naturally, Feyd-Rautha, cousin of Lady Jessica, becomes the uncle of Paul Atreides. Yet, Paul address him as a cousin before the duel.

In-law relationships are characterized differently from blood relationships in many cultures on Earth. In the case of other worlds, there is no reason to assume specific Terran relationship terms would apply.

Several shots feature a variety of in-universe solar eclipses while circular lens flaring remains present, typical of shooting against a bare sun. This means the eclipses were added in post while the ghosting present from the regular sun was left in its unaltered ellipse form. The lens flares should be mirroring the visible ecliptic patterns, i.e., crescent-shaped lens flares during partial phases, and other patterns congenial to the more complex dual moon phases.

When Emperor Shaddam Corrino IV receives Paul's challenge, he inspects the Atreides seal Paul stamped with his father's ducal signet in the previous shot, opens the scroll to reveal its engraving, and promptly drops it on the ground.

The scroll remains visibly open when dropped by the emperor and again in the following shot of Irulan picking it up. However, in the next shot, Irulan quickly slides the scroll open to read it. While this highlights the cool prop, the scroll already was completely open when she picked it up; she has no reason to partially close it only to immediately open it again.