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human
[DUNE] When Paul or Leto have Prescience Visions are they Seeing or Creating them?

Does the person seeing the visions predict or create them? 

Paul and other prescients see multiple futures and Leto talked about cutting off all other futures that didn’t lead to the GP and it is mentioned that one or in this case the Oracle not only has to see the vision but also to act on it to make it happen. How much of the persons wants/desires shape the vision however? 

I know Paul did not see Leto because he did not presumably look further down the path that led to the GP because it was too awful for him, just as in Dune he did not look further down the path that led him to meeting the Baron “Hello Grandfather“ and whatever that entailed as it was also an awful future. 

That is without even getting into the Tarot cards of messiah which affect Paul’s visions even further and him outright searching for a future where Chani lives and then settling on one where their children love and are free from control. 

I am confused as to the mechanics of it. 

*“The prescience, he realized, was an illumination that incorporated the limits of what it revealed--at once a source of accuracy and meaningful error. A kind of Heisenberg indeterminacy intervened: the expenditure of energy that revealed what he saw, changed what he saw.”*
gpt
i presume you specifically mean the branched future path where Jamis teaches him the ways of the desert and the freman? was that real vision of one possible future? yes

does that mean it happened (will happen)? yes

but how could it happen if Jamis is dead because Paul killed him? because Paul (and Leto) experiences time and memory differently than most humans.

prescience makes it so he experiences time non-linearly, ie simultaneously living multiple existences. the "knows without knowing" part of other memory that paul is learning to remember makes it so that wherever/whenever he is remembering he can instantly recall everything that lead up to that memory as well as the events being remembered.

put it together and you have Muad'dib/Leto (and Ghanima to a lesser degree). Paul is revered as the Lisan Al Giab by the pan and grabben folks and he is the Duke Atredies, but he's still a young man (13-15ish) and he's only found the key, put it in the lock, and just turning the key in the lock. the lock isn't open. the true powers lie mostly dormant. But the sleeper is stirring.

another moment, before jamis, is when paul knew everything about surviving in a sandstorm after crashing with his mom. part of this is that Paul is familiar with a fremkit because duncan brought one back and they are kinda standard equipment for anyone going into the deep desert. another part is that Paul is sort of remembering how to survive and use everything correctly due to accessing his prescient other memory. this is happening because of the spice saturating the air and also the pressures of the crisis/survival. he demonstrated this ability slightly when his stilsuit was fit desert-fashion, like a freman.

right now, he's in survival mode and that pressure is what is needed to unlock his potential. also the spice, it is vital to tapping into human potential.