Factual error: Through the entire episode, the nightwatcher sand worm is moving through sand like a whale does through water. It's a large, massive creature. Yet almost no sand is really displaced or moved around by it. Only a bit of shading is used and some bits of sand are shown thrown up when it surfaces, but there should be large "waves" or wakes of sand as it moves through it, especially in the faster moments. The most we see is it fills in BB-8's sand trail as it moves under it at one point. (00:00:43 - 00:02:25)
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