Mount Shasta is another place you can observe this phenomena and it stands alone, no snow anywhere but on the mountain itself, especially in the summer months.
https://www.reddit.com/r/EarthPorn/comments/5aqp60/sunrise_over_mt_shasta_mt_shasta_california_oc/
https://www.twenty20.com/photos/c9c0345c-42d6-463c-aa54-5fd93eabfd19
Who wrote that snow needs to be nearby?
You are suggesting that snow needs to be nearby to make these mountains shadows go upward?
No.
I am not suggesting that.
So, if shown that these mountains produce the same effect with no snow, what then?
Perhaps one would first need to consider the reflectivity of other surfaces.
Can you make a diagram of the sun under the horizon shining on snow reflecting upwards to the clouds and wouldn’t this happen anywhere there would be snow and a large object?
Why would I need to make a diagram of the Sun under the horizon?
I do not believe the sun ever goes under the horizon.
So, if the reflectivity is causing the phenomenon, would you say that every tree or for sake of argument... "some trees" beside a large body of water to their west would have upward slanting shadows at sunset against a larger object to their east? Surely that's an easy thing to experimentally show.
It's was totallacky making these claims of bodies of water and snow causing this phenomena.
I showed that Mt Shasta also produces this phenamena and it's a stand alone volcano where ALL areas surrounding it are well bellow snow level and there are no bodies of water near it.
Further more totallacky would have to show any reflective surface that could be responsible for this phenomena to line up and cast the reflected shadow that we see.
The simple facts are you see the sun rise at the horizon, sun shine hits the Mt, the Mt block the sun shine causing it to cast a shadow. The direct line is easily calculated. This can be seen in the pictures we've posted.