After Alien, Vanlint was Director of Photography for the 1981 fantasy-adventure film Dragonslayer.
"Castell y Gwynt" and the "Cantilever Stone" were used in Walt Disney's 1981 movie Dragonslayer, this was one entrance to the Dragon's lair.
Many readers, though, surely know him better as the author of an ecological science fiction trilogy, the Erthring Cycle (1984-1986), and of several movie novelizations (Corvette Summer, Dragonslayer, *batteries not included, and Willow, the last three of which were translated into French and the second in German).