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Message: <blockquote data-quote="N'raac" data-source="post: 6221333" data-attributes="member: 6681948">And yet the air pressure does not change the weight of the air in a bag of holding, does it?"Is a Bag of Holding the same as a mundane container in this regard" is the real question, though.  How permeable is the aperture between our dimension and the non-dimensional space within the bag?Actually, the rules say a closed bag with a person in it can support that person for 10 minutes, regardless of the capacity, used or unused, regardless of the size of the creature/person, always 10 minutes of air.  That seems inconsistent with physics.  It's a close enough compromise for gameplay, but then again so is "something must either pass through the aperture or remain on one side so you can't stick your head in there indefinitely but liquids don't flow in".OK.  How about "because all bags of holding hold air sufficient to sustain a creature for 10 minutes, replenishing same whenever the bag is opened".  Now, that seems to fly in the face of "oh, it's all full of water now", doesn't it?I'm not discussing the weight of the bag with air in it, but the weight of the air in the bag.  You're weighing it down with water, but air is not weightless, nor is its weight a constant.  So why does the weight of the air not change, thereby altering the remaining weight the bag can hold?  Perhaps because the air in the bag is a constant and it doesn't allow other media to flow in automatically.  "The only answer?"  No.  But not an answer with no merit either.  The fact is, we are dealing with magic, and magic by definition defies the laws of physics.  It's bigger on the inside than it is on the outside.  Its weight is a constant regardless of what is placed within it.  A scruple over the limit and it is destroyed.  None of that is consistent with real world physics, so real world physics is not the only reasonable basis for a ruling.I submit that a person carrying 30 pounds of cordwood strapped to him will not sink based on the laws of physics.  Does that mean, in your game, they will?  What about 15 pounds of stout leather, sufficient to make a huge inflatable bladder, full of air?  Does it sink or float?  If I dive under a ship, then grab it, and next fail a swim check, does it sink because I am carrying far more than 15 pounds of gear and I failed my swim check?  That sounds pretty stupid as well, but, as you said, "By the rules, a person with 15 pounds of gear will sink if they fail a swim check."As I said, it's the weight inside that matters.   But let's look to your SpandexBag again - why could that magical spandex not expand just enough to hold the weight the bag is capable of holding, requiring someone exert pressure to push it over the limit?  Is that somehow illogical magic?  More illogical than a bag that is bigger on the inside than the outside and whose weight outside never varies?According to <a href="http://www.wizards.com/default.asp?x=dnd/rg/20051101a" target="_blank">http://www.wizards.com/default.asp?x=dnd/rg/20051101a</a>, those nondimensional spaces are also extradimensional.I don't believe there is any indication of what happens if a gate is closed when something is part way through.  It says "anyone who chooses to step through the portal is transported" and that "You may hold the gate open only for a brief time (no more than 1 round per caster level), and you must concentrate on doing so, or else the interplanar connection is severed.", but doesn't speak to anything being part way through.Now, one other interpretation would be that, just as we don't count your hands as you place things in, and remove things from, the bag, and we don't count the air within the bag, we do not count any medium which fills the bag, only things placed in the bag within that medium - so you can fill it with water without contributing to its capacity.  Not my preferred ruling, but a potentially viable one - especially if we are playing an underwater campaign and decide to assume water, not air, is the default medium.</blockquote>

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