More than one person has called it 'box shaped'.I don't think its a case of one persons memory cheating them.Simonson has stated that he thought the scene looked "Fantastic" and "cool",so obviously it had left a strong impression on him.He has also stated that he wasn't too sure how the effect was achieved,but that it didn't just involve a actor in a
suit.As I've stated before I think the comic book is a close representation of what he saw,apart from the Alien changing scale from one scene to the next King Kong style and minor Nostromo details,The illustrated Story is remarkably faithful visually to the film,right
down.to the characters likenesses.