The ornithopters were the best thing in the movie. And my birthday's next week...
https://www.lego.com/en-us/product/dune-atreides-royal-ornithopter-10327
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@dpiponi I was really surprised that the movie depicted ornithopters as using bearings and joints to move wings: making wings deflect using compliant mechanisms would have provided a reason for using them instead of helicopters (abrasive dust would be less kind to joints and bearings than to compliant mechanisms which require no lubrication).
@robryk Most concept artists don't know what a flexure/compliant joint is. The director almost certainly doesn't, nor does the majority of the audience...