There should be a dropdown option after downloading that says "show advanced options" then "download anyway". Also, make sure to right click the mediafire blue download button and hit "open link in new tab" so you don't get an ad.
Don't know anything about PSX but for PS2, this occurs when you upscale the image but leave alpha channel the same, DM me the dump and I'll upscale it with 4xHDcube including the alpha channel
That game is an infinite dump game which means only the most dedicated fan will attempt a pack. As is said constantly. If you really want it to exist, dump the game yourself.
Since it's possible to edit the ISO's to change some textures, you could do the same for audio, though it would be a lot more time-consuming to do that, and you would need to make an ISO patcher program to avoid any legal trouble.
Some upscalers can't be bothered to research what models are best for upscaling so they go with the first option. If they're taking the path of least resistant than it's safe to assume they're upscaling duplicates, even when it sometimes doesn't make a difference. Also PS1 dumping is still in...
With Recompilation/Decompilation projects getting more development https://decomp.dev/projects I think it's a good time to talk about the pros and cons of emulator vs decomp texture packs.
Decompilation
+All textures can be altered
+Uncapped FPS & significant performance boost
-Each game...