Even the desert scenes were filmed with a dark tint.
Lots of other things to nitpick, but that was by far the most egregious.
Btw, at the end how did the Fremen suddenly know how to fly the emperor’s captured ships?? They are desert dwelling primitives. That would like having Bedouins flying captured Apache helicopters without any training.
Overall: 6/10
Not oly they knew how to fly them, but somehow they had planned all logistics on which planets to attack, who does what, they have taken supplies for the trip(from where? , they were equipped for combat 10 minutes ago), they hired guild navigators to guide said ships, all in the span of maybe 2 months (Jessica looks maybe 6 months pregnant).
Paul barks a short order and all of them know exactly what to do. If I had 2 fremen in my company we would fire everyone else and we will be worth like 1 trillion dollars in 3 months :)