That...is amazing. And depressing.
Some of those are stunningly detailed...whoever worked on these really cared about this game when they were making it. I'm in awe at some of these images, as I can faintly recall playing through these areas of the game (it's been a few years) and...yeah, so much, SO MUCH of this is lost when you see it in the actual game. The game itself does not do the sheer level of detail going on here justice. It actually makes me a bit sad.
Looking at these also begs the question: why was there a PC version of VII and VIII but not IX?!?!?!?!?!? Not that the PC versions of VII and VIII did their backgrounds justice either, but man!
Heck, if SE still has these images stored away somewhere, it wouldn't be too hard for them to release an enhanced remake of some sort.
God bless the guy who gathered these up and God bless the creators. These are an absolute treat to look at and really make me want to go and play Final Fantasy IX again.