Adventuring at Twin Peaks showed my stench resistance at 4-5, while in reality it was 2-3 (3 being after casting astral shell).
modtrace stench res showed these buffs:
Type
source
stench res
(cumulative)
Skill
Diminished Gag Reflex
+2.00
=+2.00
Item
Pantogram Pants
+2.00...