I was looking over the rules for stealth and invisibility and noticed something. Invisibility gives you a +20 to your stealth roll when moving. The rules for stealth say that it is impossible to use stealth when attacking, running or charging. It later gives an exception for sniping so that is obviously and exception.
So if an invisible creature is moving slower than a run and not charging you get to make a stealth roll at +20 and the opposing creature gets a perception roll to spot him. If the invisible creature is running or charging then they do not get a stealth roll and the opposing creature has to make a perception roll of 10 to spot them.
This would indicate that if you are running or charging you are pretty much automatically detected. So my question is does running or charging break invisibility?
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Just off the cuff... When you are invisible, other folks are as-if blind to you, and blind allows a Stealth check. I would say that if your are running while invisible, you can still make the Stealth check, but only at +20 instead of +40.
There is another penalty to Stealth for moving at "more than half speed but less than full speed" of -5. That's in the RAW. Again, off the cuff, I'd say a GM would be fair if she doubled that to -10 for moving at full speed w/o something like Fast Stealth, and even -15 or -20 for running (which you normally couldn't do, but I'd argue you can while invisible). But I don't think that's RAW. It would pretty much nullifies the invisibility, but it would still allow you to use your Stealth modifier to try.
The rules for stealth are very clear you cannot use stealth while running or charging. There are special abilities that allow you to do so, but invisibility does not state that you can use stealth where you would otherwise not be able to.
Being blinded does not allow another person to make a stealth roll on you. Instead it causes any sight based perception rolls to automatically fail. The perception roll to spot the invisible creature is obviously not a sight based perception roll so it will not automatically fail. The creature trying to spot you can see your interaction with the environment like stepping in a puddle, so I would not even impose the -4 on opposed perception rolls that blinded normally gives.
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Of course, the subject is not magically silenced, and certain other conditions can render the recipient detectable (such as swimming in water or stepping in a puddle). If a check is required, a stationary invisible creature has a +40 bonus on its Stealth checks. This bonus is reduced to +20 if the creature is moving. The spell ends if the subject attacks any creature. For purposes of this spell, an attack includes any spell targeting a foe or whose area or effect includes a foe. Exactly who is a foe depends on the invisible character's perceptions. Actions directed at unattended objects do not break the spell. Causing harm indirectly is not an attack. Thus, an invisible being can open doors, talk, eat, climb stairs, summon monsters and have them attack, cut the ropes holding a rope bridge while enemies are on the bridge, remotely trigger traps, open a portcullis to release attack dogs, and so forth. If the subject attacks directly, however, it immediately becomes visible along with all its gear. Spells such as bless that specifically affect allies but not foes are not attacks for this purpose, even when they include foes in their area.
I would say running or charging does not break invisibility. I would say the target or anyone nearby could make a perception check to hear the steps DC 10 + 20 for invisibility. While sound can be heard at 10, it would be harder to pin point the source when it is invisible. I would say a person would know general direction of sound at DC 10, but not the exact location.
[. I would say the target or anyone nearby could make a perception check to hear the steps DC 10 + 20 for invisibility.
DC 10 is the sound of a creature walking, a running creature would, necessarily be louder than that. Also, you'd say invisibility would make the steps quieter?
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I would say the person can't detect where the sound is coming from unless the pass the DC 30. As I posted above they can be heard at 10, but they can't pin point where they are coming from. As the DM you could lower the DC for running from 10 to 5, but the invisible character still gets the +20. Same if they are running through puddle the DC would go lower even more. But also the DC could be higher because of the starting distance so. DM's call on that one.
The problem is that you cannot run and use stealth; the rules on stealth clearly state this. I take this as an automatic failure on your stealth roll. Since there is no stealth roll to oppose then the creature spotting the invisible creature just needs to make a normal perception roll, not an opposed roll.
I would say the person can't detect where the sound is coming from unless the pass the DC 30. As I posted above they can be heard at 10, but they can't pin point where they are coming from. As the DM you could lower the DC for running from 10 to 5, but the invisible character still gets the +20. Same if they are running through puddle the DC would go lower even more. But also the DC could be higher because of the starting distance so. DM's call on that one.
Invisibility only grants +20 to stealth checks. A running creature cannot use stealth, so there's no check to get the bonus.
The DC to hear the footsteps of a running creature is the same invisible or not.
But the DC to spot you is 20 higher than it would be otherwise. The spell description only says +20 to stealth checks, but the perception skill table says +20 to DC. And no, that doesn't mean +20 to stealth checks to set the DC, and then another +20, that would be stupid.
Are the footsteps invisible?
We're not making a check to notice the creature, we're making a check to hear the footsteps.
Invisible rotting garbage is still a DC -10 to smell, as well.
I missed the +20 DC to perceptions rolls. That is what I was looking for. So the way I would interpret it now is if the person is invisible while running the other creature needs to make a perception roll. If they make a straight perception roll of 5(Maybe 0) adjusted for distance and other factors they have figured out someone is in the area. If they make a perception roll by 20 than they have pinpointed the invisible creatures exact location.
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Ignoring Concealment: Concealment isn't always effective. An area of dim lighting or darkness doesn't provide any concealment against an opponent with darkvision. Characters with low-light vision can see clearly for a greater distance than other characters with the same light source. Although invisibility provides total concealment, sighted opponents may still make Perception checks to notice the location of an invisible character. An invisible character gains a +20 bonus on Stealth checks if moving, or a +40 bonus on Stealth checks when not moving (even though opponents can't see you, they might be able to figure out where you are from other visual or auditory clues.
That should cover it. The character is not stealth, hence running is allowed. Now IF the opposed person makes a perception roll. He would have to beat the stealth roll, with penalties or bonuses based on distance or other factors at the point where he'd want to attack. So basically +1 for every feet. Which would be +0 if he is nearby, but if attacking at range it could be an issue.