Ridley Scott credits Edward Hopper's painting Nighthawks and the French science fiction comic magazine Métal Hurlant.

The film's special effects are generally recognized to be among the best of all time,
using the available (non-digital) technology to the fullest. In addition to matte paintings and models, the techniques employed included multipass exposures.

In some cases this was done 16 times in all. The cameras were frequently motion controlled using computers.
Many effects utilised techniques which had been developed during the production of Close Encounters of the Third Kind.

Chew, if only you could see what I've seen with your eyes" -Roy