Useless would mean it doesn't work, 4x and 3x mods might cap out at 2.5x resolution but they still work.That's because the 4x mod is useless. The game doesn't accept values that high and doesn't do anything with it. The same goes for this "MIchael Chen"s 3x res mod by the way. The game doesn't accept anything higher than 2.5.
It will use the default max. Otherwise people using 4x and 3x mods wouldn't see a difference in unmodded.for example: "red_AtMaxX": 3.0
will the game use 2.5 or the default value 1.0?