I currently have my Disarmer at Master perception 21 points.
In MM7-8 with that high perception I could see hidden walls/switches BUT not here.

She never suffers damage even with exploding chests - just cant see anything hidden.

Any ideas
Chhers

Main use of Perception in MM VI is chance to avoid trap's damage, ability to loot from bone piles and ability to open door in one of Baa Temples which is mandatory for progress. It doesn't really help much to notice hidden switches and doors. And you don't really need more than 4 Expert in Perception to be able to loot all bone piles and open that one door in Temple.

I may be wrong, but I remember reading somewhere that perception level along with luck also influenced rewards from creatures killed. You can get better and more treasure from a character with a high perception.

People in my land disassembled nearly entire game and they found nothing about perception influencing loot.

I always thought that Perception allowed you to find extra things like wands and alike.

In MM6, some objects only allow you to retrieve treasure from them with a certain level of Perception skill. Skull piles and Garbage mounds are the two that I know of.

http://www.celestialheavens.com/forum/10/7457

Also, the Superior Temple of Baa has some doors that can only be opened with 7 Perception (can't remember if you need to be Master as well)

http://www.mightandmagicwalkthrough.com/mightandmagic6/249-superior-temple-of-baa.html


Edit: sorry didn't realise this is pretty much what Sarisio already said :P