I was curious to try making a game that uses pregenerated backgrounds, like games from the days of Yore.
does anyone know if someone has made a game with Unity that uses this kind of graphics?
You mean a Skybox?
No, I’m pretty sure he means pre-rendered backgrounds like in Final Fantasy 7.
oh, pre-rendered, is that the term? I always heard people say pre-generated
It’s pretty simple if you know how to do the backgrounds.
They were lovingly drawn pixel-by-pixel in the olden days. To borrow a movie-making term, they were “matte painted” backgrounds. In FF9, they’re hand-painted but probably had a little help with computer to block out the space with convincing perspective. In the FF7 re-release above, they’ve redone the backgrounds fully rendered, and it is a bit unsettling in my book.
But yes, making an engine like that in Unity should be no problem. One panel for the background, some other locked billboard-style scrims for areas that can occlude the character (like walking behind a tree), and the rest is just moving around on an invisible or projected ground.
This.
I have a Best Hits FF7 disc set for my PlayStation…I’m pretty sure the backgrounds were fully rendered for FF7 even back in the day of its production, not hand-pixeled.
Yeah, my 16 years old copy of FFVII has pre-renderer backgrounds too. Very pixelated but not hand-painted. It was a really common technique. My young self probably couldn’t distinguish between the two though.
It probably took quite a few hours to renderer a single background back then and now we have phones which could do those backgrounds in real-time. 
And now, even movies are moving starting to move to real time. http://www.theinquirer.net/inquirer/news/2295956/lucasfilm-will-combine-video-games-and-movies-to-axe-post-production-process