I have a problem: the textures in my save file have become square. I was able to fix this problem a long time ago, but I don't remember how exactly, and I can't find a solution on the Internet. Playing with such graphics is not very pleasant, and it is very distracting.

this is how it looks

Try resetting your graphics options back to default, and see if that helps any. If that doesn't help, maybe trying regen save data.

not working(

Go to your settings, effects tab or game, i don't remember, increase texture pool size until it looks fine;