Just distilling 3 novels into magazine article length was difficult, but I covered the world, its creatures, and its people in D&D terms. Fortunately, the collaboration went very well, and I have a few hand-drawn maps and illustrations of Mieville's to keep as souvenirs.
I'm very curious to see how the final, edited, illustrated version turned out. January still seems far away. But I'm quite proud of this one; it required a lot of research, Q&A back and forth with Mieville, and even so, some rewrites to bring the fiction into alignment with the game.
They don't mesh perfectly, of course, but it's as close as the limits of game design allow. I have a few complimentary emails to that effect that I'm basically saving in my email archive for the days when the writing isn't going well.