Welcome to Caladan, the home of House Atreides, high on a rock cliff stands Castle Caladan, its appears dark and medieval. There is a window on the seaward wall lit from within, this is the Atreides library, containing many documents on an uncountable number of topics, below is a selection from the Dune area ...
To fit a 600 page novel into a little over two hours clearly means that many scenes from the book will never make it onto the silver screen, however, at least a couple of hours of extra scenes were filmed, only to end up on the cutting room floor.
All films contain mistakes, or 'bloopers'. Dune has its fair share, such as the tripping Navigator, find details of them here.
Dune Scripts and information from David Lynch, Alejandro Jodorowsky, John Harrison and Joe Ford / Bob Greenhut for the Arthur P Jacobs version.