Reasonably serious (for some definitions of "reasonably"). The illustrations were commissioned for a book published by NASA describing a design study on perman

Reasonably serious (for some definitions of "reasonably"). The illustrations were commissioned for a book published by NASA describing a design study on permanent space habitats at L5 creatively called "Space Settlements: A Design Study". I got this book as a kid in the late 70's and it was one of my favorites. I pored over each page oh so carefully for years. The study went into a fair amount of detail about what would be required to support 10,000 people in a stanford torus at L5. Everything from radiation shielding to sewage systems. From construction techniques to creating day-night cycles. An online version HTML of the book is here: https://space.nss.org/settlement/nasa/75SummerStudy/Table_of_Contents1.html and one with proper layout (and a link a PDF) is here: https://archive.org/details/SpaceSettlementsADesignStudy1977/page/n11