I was responsible for creating most of the Shattered moon skybox and Vista. I create the land chunks and the small meteors with Houdini and Zbrush.
The shattered moon is also visible in the skydome of Koboh.
I was also responsible for creating the moon's surface during a landing cinematic. Since it is a large area, I used Gaea to create the big terrain.
The end result is massive teamwork done by many talented artists. Here are some of the artists who are also involved in creating this environment:
Concept - Luke Suzumoto
Skybox - Hanhee Lee
Lighting - Sam Santillo
Environment - Ignacio Guajardo
VFX - Kirkor Kasparian
And many more...