lunar colonies

this is a cover illustration for a book that is a collection of essays on lunar colonies. type may or may not be placed in the sky, so i left room just in case. this is a pretty hypothetical collection of colonies - but I fact checked with the author to make sure none of the structures were physically impossible. i wanted my illustration to be a departure from the typical technical illustrations done for books like this - and i wanted to focus more on making the colony a place that someone would actually want to live! despite being hostile - it should look inviting!