https://textualvariations.substack.com/p/lynch-dune-4hourcut
This is a very interesting article on the history of the many cut’s of Dune and the Unrealised and unknown Directors cut.
https://www.thepropgallery.com/dune-john-dykstras-visual-effects-breakdown-binder
Apogee (John Dykstra) production binder before they left the production and another Effects house Van der Veer took over
https://www.thepropgallery.com/dune-apogee-production-used-storyboards
Found the story board for Keynes (Max Von Sydow) death scene spice blow perhaps this was to go with the water of life from the baby worm scenes?
https://www.worthpoint.com/worthopedia/dune-465-storyboards-copy-private-1820640753
This site also has many storyboards and some real interesting ones too. Angels seen in Pauls Dream. Jessica floating in the water. It shows the hole on the Heighliner was meant to be where the Navigator was to come out obviously missing effects on that one too. Paul Atreides puking Earth wind and fire. Navigators swarming Pauls face There is some fascinating stuff there.