I am currently lvl 8 and clearing out Od Nua Level 9. I'm at the point where I'm supposed to find a hidden wall switch in Search Mode, but I have walked past the damn thing a dozen times and none of my party can discover it.
Do I need a minimum Perception score to make this discovery? Walk back and forth past the switch until it glows purple? Sacrifice one of my party to Skaen? I'm lost.