fSneakDistanceBase - базовый шанс для возможности скрыться.
Значение по умолчанию: 0.5
известная формула
PC sneak chance = ( fSneakDistanceBase + Distance * fSneakDistanceMultiplier).
Код из OpenMW:
if sneaking:
sneakTerm = fSneakSkillMult * sneak + 0.2 * agility + 0.1 * luck + bootWeight * fSneakBootMult
else:
sneakTerm = 0
fatigueTerm = fFatigueBase - fFatigueMult*(1 - normalisedFatigue)
where normalisedFatigue is a function of fatigue. empty fatigue bar -> 0.0, full fatigue bar -> 1.0
distTerm = fSneakDistanceBase + fSneakDistanceMultiplier * Distance
x = sneakTerm * distTerm * fatigueTerm + chameleon (+ 100 if invisible)
