what could be causing this problem

[wraith bison]

massive UV sizes

so instead of just using the texture(s) you specified it now stretches into neighboring textures in the texture atlas (the one generated by the game when you load the pack)

[lament leaf]

that is, if I create a separate folder for this model, this will not happen?

[wraith bison]

no

your UV is faar too big

bigger than your texture

that's the problem

[lament leaf]

well everything seems to fit

[wraith bison]

click on any cube of your model, then look at the values below the UV screen

[lament leaf]

?

[wraith bison]

hmm, weird, that does look correct 🤔

[lament leaf]

I also think that everything is correct, but for some reason

[carmine zealot]

Could you send the model? I'd like to take a look at that

[lament leaf]

yes ok no problem