Leiji Matsumoto illustration for the Japanese translation of “Black God’s Kiss” by C.L. Moore, a sci-fi/fantasy author who is probably best known for being the co-author (with husband Henry Kuttner, under the pseudonym of Lewis Padgett) of “Mimsy Were the Borogoves,” which inspired the film “The Last Mimsy.” You can see more of the C.L. Moore illustrations at the source link.
Fantasy heroine Jirel of Joiry encounters C. Moore’s sf protagonist, Northwest Smith! Art by Herve Leblan for the French editions of _Jirel de Joiry_ and _Les aventures de Northwest Smith_. Note the shiny period rocket-ship in the background!