I think two different issues are being blurred here: hidden is unseen and unheard. Requirements to be unseen:

1. Being located in a heavily obscured area
2. Being located in a lightly obscured area only if you have the Skulker feat or Mask of the Wild - you're not clearly seen in this case
3. Positioned where something is blocking line of site
4. Invisible condition

Once these conditions are met, you role dexterity, Stealth to determine if you are silent. If your dexterity stealth check succeeds, you're hidden (unseen and unheard, and you you cannot be directly targeted). If you are unseen, it does not give a bonus to stealth. Invisible Stalkers don't get a bonus to stealth because the are invisible. They are, however, able to hide, with a successful Stealth check, at any moment because the are invisible.

I personally think the RAI are that you use Wind Walk to visibly move past someone without hiding, with the assumption that they don't know you are the wisp of cloud. It can also be used to slip through a small area. If you're outside, I think you should be able to move past most creatures without causing alarm. If you're in a dungeon or a warehouse, for example, I would think it is highly suspicious to see a cloud float by you. You might want to call for an Intellect check to see if they are suspicious.

I think two different issues are being blurred here: hidden is unseen and unheard. Requirements to be unseen:

1. Being located in a heavily obscured area
2. Being located in a lightly obscured area only if you have the Skulker feat or Mask of the Wild - you're not clearly seen in this case
3. Positioned where something is blocking line of site
4. Invisible condition

Once one these conditions are met, you role dexterity, Stealth to determine if you are silent. If your dexterity stealth check succeeds, you're hidden (unseen and unheard, and you you cannot be directly targeted). If you are unseen, it does not give a bonus to stealth. Invisible Stalkers don't get a bonus to stealth because the are invisible. They are, however, able to hide, with a successful Stealth check, at any moment because the are invisible.

I personally think the RAI are that you use Wind Walk to visibly move past someone without hiding, with the assumption that they don't know you are the wisp of cloud. It can also be used to slip through a small area. If you're outside, I think you should be able to move past most creatures without causing alarm. If you're in a dungeon or a warehouse, for example, I would think it is highly suspicious to see a cloud float by you. You might want to call for an Intellect check to see if they are suspicious.

I think two different issues are being blurred here: hidden is unseen and unheard. Requirements to be unseen:

1. Being located in a heavily obscured area
2. Being located in a lightly obscured area only if you have the Skulker feat or Mask of the Wild - you're not clearly seen in this case
3. Positioned where something is blocking line of site
4. Invisible condition Once these conditions are met, you role dexterity, Stealth to determine if you are silent. If your dexterity stealth check succeeds, you're hidden (unseen and unheard, and you you cannot be directly targeted). If you are unseen, it does not give a bonus to stealth. Invisible Stalkers don't get a bonus to stealth because the are invisible. They are, however, able to hide, with a successful Stealth check, at any moment because the are invisible.

I personally think the RAI are that you use Wind Walk to visibly move past someone without hiding, with the assumption that they don't know you are the wisp of cloud. It can also be used to slip through a small area. If you're outside, I think you should be able to move past most creatures without causing alarm. If you're in a dungeon or a warehouse, for example, I would think it is highly suspicious to see a cloud float by you. You might want to call for an Intellect check to see if they are suspicious.

I think two different issues are being blurred here: hidden is unseen and unheard. Requirements to be unseen:

1. Being located in a heavily obscured area
2. Being located in a lightly obscured area only if you have the Skulker feat or Mask of the Wild - you're not clearly seen in this case
3. Positioned where something is blocking line of site
4. Invisible condition

Once these conditions are met, you role dexterity, Stealth to determine if you are silent. If your dexterity stealth check succeeds, you're hidden (unseen and unheard, and you you cannot be directly targeted). If you are unseen, it does not give a bonus to stealth. Invisible Stalkers don't get a bonus to stealth because the are invisible. They are, however, able to hide, with a successful Stealth check, at any moment because the are invisible.

I personally think the RAI are that you use Wind Walk to visibly move past someone without hiding, with the assumption that they don't know you are the wisp of cloud. It can also be used to slip through a small area. If you're outside, I think you should be able to move past most creatures without causing alarm. If you're in a dungeon or a warehouse, for example, I would think it is highly suspicious to see a cloud float by you. You might want to call for an Intellect check to see if they are suspicious.