The game stops giving you fabric after you've looted enough to completely upgrade both your quiver and rations. However, there's also an altar in Eurviscire that requires 5 fabric to complete. This means it is literally impossible to 100% complete this game. If you fully upgrade your quiver and rations, you will never be able to complete the altar. Or, if you do the altar early for some reason, it will be impossible for you to complete your upgrades on the quiver/rations. Please fix this soon. Maybe by changing the item that is required for the altar to something that there isn't a finite amount of.