One of the builders jamsessionein
The build you see was produced over the course of a few months of on-and-off work. It was modelled with the back stage in the ‘open’ position, versus the ‘closed’ one that you can see in the introductory cinematic to Final Fantasy IX, which makes the stage visibly accessible. The entire interior has been fleshed out by referring to concept images from Squaresoft and, while a bit labyrinthine, is fun to explore. Thanks go to apricotmuffins, DaxKlevin, Avver, Jusserhead and luscan for their contributions!
The Crafti.ca server texture pack was used in the video and renders above. It is available for download here if you want to try it!