gonzogolf wrote in post #17859918
That looks like pulled cotton to me. I dont think there is anyway that front lit vapor would cause a shadow that deep or show that much texture.
I don't know about that, you can get some pretty spectacular effects from dense areas of water vapour, just look at the various Cumulus type cloud formations. They can even cast some pretty defined shadows, with a separation of up to about 5000 feet. Given that the posted image seems to be lit by direct flash I'm quite sure it is indeed a cloud of vapour at a close distance to the background.
The other thing about clouds of vapour is that they tend to be fractal in nature, so no matter what scale you look at them from the detail tends to remain constant looking.
Alan