|Superman Lives: Sylvain Despretz' Skullship concept art for the unmade Superman Lives (1997)|
a) On the 23rd of June, 2017, I decided that the the engines section references the pipe work from the lower half of Giger's National Park from 1975 , of course consciously or unconsciously. This painting itself appears to reference Dali's The Great Masturbator, which in turn is a painting that I think references the Henu Barque. (See: HR Giger's National Park)
b) In Giger's National Park, two tentacles form a shape that Sylvain could perhaps have turned into the nasal cavity in this case, and this strange bean like form with a cross vaginal opening becomes the eye and Sylvain perhaps find himself turning this into the eye socket window.
Of course it would be easy for artists to draw some kind of a skull face, but the position matches up near enough with Giger's painting.