The resize itself isn't bad, on some scenes it's great, but the transparency is bad.
On most fields the transparency is not cut out.
In FF7 only pure back is transparent, so all the 'almost black' pixel are shown.
Also FF7 don't use half-transparent pixels, they're shown as full opaque pixel.
The only way to realy have correct tranparency is to:
1)extract .tex from lpg
2)convert .tex to png
3)select transparency in png and fill it with full black (#000000)
4)uspscale
5)in upscaled pictures cut out the pixel witch need to be transparents
parts 3 and 5 can be automated with imagemagik and some scripting (or programming), i've done it this way when i upscaled the game textures with waifu
thanks for your works