I'm going to go ahead and say that no movie really needs upscaling. Live action movies on 35mm film? Perfectly HD capable with a master in good condition. There's still room for higher resolutions even.
And CG?
CG movies are always, and I mean ALWAYS rendered at REALLY high resolutions. The source material is most likely rendered at a much higher resolution than just 1080p.
They even commented in an interview that the original material already was HD etc.
The Crisis Core FMVs also were already in HD when they rendered them originally (what, you think they actually work with 272p there? )
And it's a shame, really. The CC ending you've seen there gives us a glimpse at what ALL of those CC FMVs look like on the computers they're rendered on - and it all had to be compressed to that itty-bitty format. =/
You can't just upscale movies. That wouldn't be any different than having an upscale feature for DVDs in you BD player. There's no upscaling procedure that allows to create additional detail if the detail wasn't there in the first place. CG movies would have the advantage of being re-renderable, but yeah as I said...not necessary.
There's nothing to "upscaled" when the original resolution of movies like that is already a couple of thousand by a couple of thousand pixels. You could make it even more HD without re-rendering it.
If any of you think the older scenes look different compared to the rest of the material than it's probably just because they used different techniques/improved technology and had some extra time to make them extra shiny.
But it's foolish to think they just "upscaled" them when they have the original HD material all over their computers. It also wouldn't look any different than a DVD then. And it's definitely much sharper than that.
I too was pretty pissed off. Another reason why the added scenes are noticeably different is because the original scenes were rendered with the White Engine, whereas the new scenes are rendered with Crystal Tools (basically a newer version of the White Engine, which is currently being used for the FNC games). This is the reason why Cloud's new face render looks a lot like Noctis' if you haven't noticed, mostly in terms of the eyes and nose.
They don't use these engines for those pre-rendered graphics, I'm pretty sure.
That's a graphics engine for consoles etc. They use programs like Maya for CGI movies.