DOOOOOOOOOONT the first dune movie is the biggest crime ever done . never met adune fun that didn't had something bad to say about it sorry but they totally frag the story 
I'm going to assume you missed the black portal of a movie Hig...nope, can't do it, it doesn't exist. On a completely unrelated note, isn't it weird that they went straight from the first Highlander movie to the the third one. It's like there's a gaping crater where a second one should be.
It even made Terminator 3's dialogue look good. I mean seriously, standing in front of a giant metal bunker door and stuttering "huh...this must be a blast door of some kind." We're supposed to believe
that is the future John Connor that leads mankind against the machines.
Dune wasn't good, but it wasn't by any means the worse. It's pretty much a general rule, any movie created from a book is going to do some at minimum minor butchering. I can only think of one movie better than the book it was based off of (then again, I've had bowls of alphabet soup better than that story so it's not saying much).