I’ve looked into it further. I thought, maybe I changed some part of the pak file that was irrelevant and thus wasn’t triggering sign check.
I’ve looked into TmpPackaging folder with indices for pak files to find a specific asset that has several strings in it.
I’ve opened the pak file that contains it, found where it is stored within the pak file and change a single bit (this time 4 → 5, 100 → 101) that I know is within that asset. I started the game and the asset no longer works in the game, which means I really did break it in some way. The game did not detect I tampered with the pak file though.
What gives? How do I make it work?