At any point when anyone is on the mountain, while they are in a tent or trapped in a cavern, you can never see their breath. You see it when they're outdoors, but as soon as they enter their tents or it shows the people trapped up on the mountain, it warms up enough so that their breath is no longer available.
Good point; i didn't notice that!
But, eventually, in a tent, wouldn't body heat warm the air up enough to not see breath? And it was dark in the cave-- even when it's frigid, you can't really see your breath in the dark (you only see your breath when light reflects off the vapour in your breath). Besides, they wouldn't digitally edit out breath, so it must not have been there. And if it wasn't there in real life, then how is it not realistic, or for that matter, a slip-up???
The real reason for this is because all the tent shots where filmed against a blue background, most of the times you can easily tell when they use the blueback it's done so poorly. It's a slip up! The forgot all about it.
The reason its a slip up is because, obviously, the actors weren't filming outdoors at that time. They were in a studio, where its nice an' warm. Can't have actors cold now, can we?
If you watch the commentary, on the DVD, they say that they talked to actual climbers and they said once you get high enough, there is no condensation. It's just so dry.
I find it very hard to believe that the reason the climbers breath doesn't condense has anything to do with a quest for realistically portraying conditions at altitude after researching the subject with mountaineers.
Otherwise scenes such as the one involving a running jump over a huge gap while wearing crampons, would definitely have ended up on the cutting room floor
Come on, it's not a slip-up if what MANTI5 said is true. If they mention it in the commentary on the DVD then it was on purpose and then it's not a slip-up. Easy as that.
And if you would accidentally make something realistic by error(say when filming in a studio) then it's still not a slip-up. Something needs to be wrong for it to be a slip-up.
WHAT ARE YOU TALKING ABOUT??? That's not a slip-up! What did they do wrong? Obviously there wasn't any breath there! There's no reason to cut out the breath! I mean, it's a waste of time for them, and then it makes the movie less realistic! It's probably true that it's just way too dry up there for the breath to appear! (It makes sense)