Actually I have a 4080 and a 4K monitor. I put the game in english so you will understand what I meant :
So I put the resolution scaling at 200%. I don't know if it's real 8K but the image is crazy good. Unfortunatly there is no DLSS in this game.
On the Nvidia panel (?) I put the DSR at 4.00x so I can also do the same thing on FFXIII-2 right now.
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I wanted to show you a cool filter that gives a cell shading like image (à la Borderlands) but it's only for multiplayer :