Does being invisible grant any bonuses to the tumble check?
No. Neither the rules for invisibility nor the rules for acrobatics skill make any reference to any such bonus.
What if the character is trying to do it stealthily ?
If anything, that would make it more difficult to so tumble.
Makes the stealth check?
The creature tumbled past doesn't know that you passed through his/her square nor where you've ended up.
Fails the Stealth check?
The creature tumbled past knows you did it (assuming you made the acrobatics check) or (if you failed the acrobatics check) that you tried and failed.
Remember, invisible is not necessarily undetectable or undetected.
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They wouldn't gain any direct bonus, but there might be an indirect boost due to the creature losing it's Dex bonus to CMD. Otherwise, what SlimGauge said.
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Why are you tumbling through the enemy's square?
They can't take an AOO on you because you're invisible and benefit from total concealment.
Just roll stealth and take the +20 it gives you. They'll never know you're there.
Why are you tumbling through the enemy's square?
I think because the only other way to pass through an enemy's square is to overrun.
I think it might just work.
In addition, you can move through a threatened square without provoking an attack of opportunity from an enemy by using Acrobatics. When moving in this way, you move at half speed. You can move at full speed by increasing the DC of the check by 10. You cannot use Acrobatics to move past foes if your speed is reduced due to carrying a medium or heavy load or wearing medium or heavy armor. If an ability allows you to move at full speed under such conditions, you can use Acrobatics to move past foes. You can use Acrobatics in this way while prone, but doing so requires a full-round action to move 5 feet, and the DC is increased by 5. If you attempt to move though an enemy's space and fail the check, you lose the move action and provoke an attack of opportunity.
Situation Base Acrobatics DC*
Move through a threatened area Opponent's Combat Maneuver DefenseMove through an enemy's space 5 + opponent's Combat Maneuver Defense
* This DC is used to avoid an attack of opportunity due to movement. This DC increases by 2 for each additional opponent avoided in 1 round.
If the DC is only to avoid the AoO and the enemy can't make AoO against you, then can you move right through his square? Seems like it, but I n need to do more research.
The only related thing I can find is this FAQ:
Acrobatics: What happens if I fail the check when using this skill to move through an enemy's square?
You lose the move action and provoke an AOO. (Note: This means you can attempt this up to two times in the same round, once as a move action and once as a standard action.)
Update: Page 88—In the Acrobatics skill, at the end of the third paragraph (which begins on page 87), add the following sentence: “If you attempt to move through an enemy’s space and fail the check, you lose the move action and provoke an attack of opportunity.”
But this is the sort of case that if the enemy isn't even aware you're there, then you should be able to walk right past them (and creatures don't actually take up an entire 5ft square).
I think I would probably rule that if you successfully hide from them using stealth (with invisibility), that you can move through their square without needing to make an acrobatics check.
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In addition, you can move through a threatened square without provoking an attack of opportunity from an enemy by using Acrobatics. When moving in this way, you move at half speed. You can move at full speed by increasing the DC of the check by 10. You cannot use Acrobatics to move past foes if your speed is reduced due to carrying a medium or heavy load or wearing medium or heavy armor. If an ability allows you to move at full speed under such conditions, you can use Acrobatics to move past foes. You can use Acrobatics in this way while prone, but doing so requires a full-round action to move 5 feet, and the DC is increased by 5. If you attempt to move though an enemy's space and fail the check, you lose the move action and provoke an attack of opportunity.
Situation Base Acrobatics DC*
Move through a threatened area: Opponent's Combat Maneuver Defense
Move through an enemy's space :5 + opponent's Combat Maneuver Defense
* This DC is used to avoid an attack of opportunity due to movement.
Invisible: Invisible creatures are visually undetectable. An invisible creature gains a +2 bonus on attack rolls against sighted opponents, and ignores its opponents' Dexterity bonuses to AC (if any). See Invisibility, under Special Abilities.
Being invisible doesn't negate the bad guys dex bonus for CMD just AC so being invisible wouldn’t affect the check to move past it. If you rolled a stealth check and won it wouldn't be aware of you but you would still have to beat its CMD with your acrobatics.
-if the character passes the stealth and acrobatics I would run it as, the bad guy is unaware of the PC and doesn't know where they are.
-if the character succeeded on their stealth check but failed their acrobatics, I would rule it that the character accidently bumped into the bad guy which resulted in no movement and the bad guy being aware of them (but not necessarily exactly where they are but aware that there is something invisible around)
-if the character fails their stealth but succeed on their acrobatics I would run it as the character made too much noise and the bad guy is aware of them but of course doesn't know where they are exactly because the character moved through their square and are invisible.
-if the character failed both checks I would basically say they made a bunch of noise and bumped into the bad guy which gives them a pretty clear idea of which square the character is in.
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.
When the character has moved in the round they only get a +20 on stealth checks and so I would say that the bad guy is still able to locate them by sound if they can win the perception vs stealth challenge. Of course the invisible character still has total concealment and gains that 50% miss chance against any attacks coming their way.
Total Concealment: If you have line of effect to a target but not line of sight, he is considered to have total concealment from you. You can't attack an opponent that has total concealment, though you can attack into a square that you think he occupies. A successful attack into a square occupied by an enemy with total concealment has a 50% miss chance (instead of the normal 20% miss chance for an opponent with concealment).
You can't execute an attack of opportunity against an opponent with total concealment, even if you know what square or squares the opponent occupies.
Also they aren’t subject to the AoO for failing their acrobatic check because a character with total concealment can’t draw AoOs
Maybe they're blocking a doorway?
Remember that going through a r a tires space involves dodging their legs/arms/whatever being invisible doesn't grant you any means to make that easier.
Roll with your invisibility bonus and if you fail you mess up as usual
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In addition, you can move through a threatened square without provoking an attack of opportunity from an enemy by using Acrobatics. When moving in this way, you move at half speed. You can move at full speed by increasing the DC of the check by 10. You cannot use Acrobatics to move past foes if your speed is reduced due to carrying a medium or heavy load or wearing medium or heavy armor. If an ability allows you to move at full speed under such conditions, you can use Acrobatics to move past foes. You can use Acrobatics in this way while prone, but doing so requires a full-round action to move 5 feet, and the DC is increased by 5. If you attempt to move though an enemy's space and fail the check, you lose the move action and provoke an attack of opportunity.
Situation Base Acrobatics DC*
Move through a threatened area: Opponent's Combat Maneuver Defense
Move through an enemy's space :5 + opponent's Combat Maneuver Defense
* This DC is used to avoid an attack of opportunity due to movement.Invisible: Invisible creatures are visually undetectable. An invisible creature gains a +2 bonus on attack rolls against sighted opponents, and ignores its opponents' Dexterity bonuses to AC (if any). See Invisibility, under Special Abilities.Being invisible doesn't negate the bad guys dex bonus for CMD just AC so being invisible wouldn’t affect the check to move past it. If you rolled a stealth check and won it wouldn't be aware of you but you would still have to beat its CMD with your acrobatics.
-if the character passes the stealth and acrobatics I would run it as, the bad guy is unaware of the PC and doesn't know where they are.
-if the character succeeded on their stealth check but failed their acrobatics, I would rule it that the character accidently bumped into the bad guy which resulted in no movement and the bad guy being aware of them (but not necessarily exactly where they are but aware that there is something invisible around)
-if the character...
I see what you're getting at. I think the total concealment vs. AOOs rules are a little weird and it looks like there can be some absurdities with them.
In this case, I think that the asterisk on the small table that outlines the DC for avoiding AOOs clarifies it. You cited it in your post; "This DC is used to avoid an attack of opportunity due to movement." Since you can't provoke an attack of opportunity due to being in total concealment, you can freely move through an enemy's square.
The DCs there are strictly to outline the check necessary to avoid an AOO, not to be able to move.
It doesn't make much sense in some situations, like Stewart's example of blocking a door. Should a 300lb Barbarian with a greatsword, armor, and gear be able to slip past an enemy that's blocking a doorway just because he's invisible? Probably not.
RAW says he can do it because the enemy can't do anything about it anyway.
You have to 'stop in your tracks' after failing an Acrobatics check to move through the enemy's square because you provoked an AOO and not because the enemy won't let you pass.
If you want to move through a square undetected, then stealth is clearly called for.
It's clearly wonky, but it's the rules.
One issue about enemy CMD and Acrobatics though:
Being invisible doesn't negate the bad guys dex bonus for CMD just AC so being invisible wouldn’t affect the check to move past it.
Not true. Invisibility does negate their Dex bonus.
...Any penalties to a creature's AC also apply to its CMD. A flat-footed creature does not add its Dexterity bonus to its CMD.
So, it's easier to do than you realized.
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Maybe they're blocking a doorway?
Remember that going through a r a tires space involves dodging their legs/arms/whatever being invisible doesn't grant you any means to make that easier.
Roll with your invisibility bonus and if you fail you mess up as usual
Uh, they can't see you, so it's easier?
I think RAW says that if you fail your stealth check, they notice you.They still can't do anything about it on your turn though.
The enemy would have to wait for its turn to pinpoint your square and attempt to attack you.
Maybe if they had a readied action...?
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Here's what happened -
Creature in doorway. Rogue drinks a potion of invisibility. Then the Rogue tumbles through the creatures square to get behind and set up flanking.
Was trying to find out if being invisible gave any benefits to the skill check and if so, how to figure them out.
The DC of the acrobatics check is the creature's CMD + 5. As pointed above, an invisible creature negates the opponent's dexterity bonus to AC, and thus to CMD. So, that is how much easier it is.
Opponent: You can't move through a square occupied by an opponent unless the opponent is helpless. You can move through a square occupied by a helpless opponent without penalty. Some creatures, particularly very large ones, may present an obstacle even when helpless. In such cases, each square you move through counts as 2 squares.
Sorry, you can't move through that occupied square just because you're invisible. You still have to make the acrobatics check or perform an overrun.
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Opponent: You can't move through a square occupied by an opponent unless the opponent is helpless. You can move through a square occupied by a helpless opponent without penalty. Some creatures, particularly very large ones, may present an obstacle even when helpless. In such cases, each square you move through counts as 2 squares.Sorry, you can't move through that occupied square just because you're invisible. You still have to make the acrobatics check or perform an overrun.
On second thought, I think this is the right way to look at it.
The provoking AOOs section of Acrobatics was what I was focused on; that's not all there is to it.I would say Acrobatics is necessary to not stop in your tracks, but there is still zero chance of provoking an AOO from the check, and zero chance of breaking your invisibility.
Even an Overrun wouldn't provoke an AOO in this case. You'd get a +2 to your CMB for being Invisible (Combat Maneuver = Attack) and the opponent would be denied their Dex to their CMD. I think it would break your invisibility.
Acrobatics is way better than Overrun in this situation, since you can just keep trying as many times as you can get away with before your Invisibility runs out.
Should be pretty easy.