Off of that which helped with the scale as well, and shifting sands, for some of the dunes a little further out from where the worm is, because the worm is sending out vibrations and shifting sands to the left and right in front of it as it moves. right in front of it as it moves- right in front of it as it moves. ., , , ., moves. they actually built a lot of the moves. they actually built a lot of the sets moves. they actually built a lot of the sets or moves. they actually built a lot of the sets or partial- lot of the sets or partial sets. lot of the sets or partial sets, and so we had real actors on the sets, and so we had real actors on the set. sets, and so we had real actors on the set, and we had helicopters landing to kick up the dust helicopters landing to kick up the dust so we could use as reference the dust so we could use as reference to replicate. there was reference to replicate. there was a reference to replicate. there was a lot reference to repl