JohnSnow said:I doubt it'll be that simple. And it's probably not auto-detect anyway. And even if it is, it's just auto-pass for him, not his whole group. Which means that your hypothetical elf notices it and has to point it out to his group. And then they'll probably have to work together to figure out a way to disable it or pass it.
If its 10+ranks+bonuses vs. the static DC of the trap, it certainly is auto-pass or auto-fail. And if the DC is higher than the maxed out elf can actually attain, the DM is just being a jerk, because he's autofailing everyone. He might as well just randomly inflict damage on the party whenever he feels like it.
The articles comes right out and says that when something is hidden, the dm compares the passive perception score to the 'hide' DC.
If the person with maxed perception can point it out to the group before they blunder into it, its an auto-pass for them, too. Unless they purposefully ignore the warning.
Its effective immunity, unless something is hiding behind you to push you in.Because I highly doubt that noticing the trap is the same as being immune to it.
You may have to find some way to disable or bypass it, but if you can't your options are soak the damage or walk away. Unless you really, really have to go through a specific route, you take no damage from any trap found with a perception roll.
Unless a monster can trigger it at you, in which case its artillery more than a trap.