Just found this today! Cool stuff!
It is behind the scenes footage filmed by Sean Young of the cast and crew of Dune.
See her being cast in plaster for her stillsuit.
See Francesca Annis (Lady Jessica) flash her panties!
See Kenneth McMillan (Baron Harkonnen) without his fat suit
See Aldo Ray - originally cast as Gurney Halleck.
See everyone sitting around half in their stillsuits,
(Click the link above the video below to see the whole thing)