Invisible Mount & Rider

[Scrawl Da'Wall]

Ok two questions regarding invisibility situations.

1. Opponent has not pinpointed invisible threat & decides to attack an open space. In that space is a mounted invisible threat. He succeeds at the 50% miss chance. How do you determine who he rolls his attack against? The mount or the rider?

2. A large invisible Biped is using a Reach weapon in Combat.
Invisibility only Extends out to 10'. Does his reach weapon constantly reveal his location or does it only break the 10' barrier when he swings it?

Bonus points: Whats the perception DC to pinpoint him if his weapon is not constantly visible?

[Dallium]

d20pfsrd wrote:

Any part of an item that the subject carries but that extends more than 10 feet from it becomes visible

[Scrawl Da'Wall]

Dallium wrote:

d20pfsrd wrote:

Any part of an item that the subject carries but that extends more than 10 feet from it becomes visible

Yes that is the invisibility rule that caused the question.

I have read that Small Medium Large etc reach weapons are considered the same length but they double natural reach.

Extended a large biped wielding a reach weapon can attack from 15'-20'.
So 5-10' of the attack would break invisible boundary.

The question is are everyone considered to be extending their reach weapons at all times? With no facing just walking about could be a problem is such a scenario.

I realize the rule book does not generally cover situations like this & was wondering how People would DM it.

Does the reach weapon constantly break the 10' barrier or only on the turn it is wielded?