So far, nixonshead has contributed greatly to AH.com, as both a writer and an illustrator.
Kolyma's Shadow - His first timeline, which looks at how the early death of Soviet Chief Designer Sergei Korolev in the Gulag might have affected the Space Race.
The Snow Flies: A History of the Soviet Space Shuttle - His second timeline, again looking at alternate Soviet space programme history. This time, a look at alternate developments during the latter decades of the Cold War.
After coming across e of pi and Workable Goblin's fantastic Eyes Turned Skyward, he began building spaceships from the timeline in Blender, for which he won the 2014 Turtledove Award for Best Other Artwork and Best Alternate History Artwork.
You can find his online portfolio of CGI on Flickr.