I'm sorry to confuse you. Didn't want to.
Though I played all three Penumbra games I never mentioned a noise filter or such an effect and as far as I remember I played on highest settings (except resolution). Maybe just missed it.
But this noise filter should only be an nice but unessential addition.
There are a few more things that are more important or at least more useful:
- Throwing little stones to mislead enemies
- kicking enemies back (to gain a few seconds to run away)
- burn wooden objects for making light
- meeting people outside the main location (in this case the castle) to calm down, buy or share items, eat and sleep (I know those things might be unnerving after a while but who says that the player can't take amphetamine/stimulant drugs to stay awake or can't find enough items if looked for adequate?
)
- sneaking mode
- Some sort of "light meter" to measure how visible you are.
That's all so far.
membrain