I contributed to Diablo IV as part of the Worldbuilding team. My duties included level design, graybox structure block out, natural environment worldbuilding/level art, terrain sculpting and painting.
My specific contributions to Orbei Monastery was level design, graybox structure block out, and level art. I also did a lot of natural level art and level design for the salt flats and road in the area.
Lead Worldbuilder - Matt Sanders
Diablo IV is a huge team effort and credit goes out to all other teams and departments involved. Particularly working closely with Exterior Art, Props and Interactives Art, and other design teams.