I think the possible simulation could use generative AI rather than using the old method of simulating every atom in the universe. Note that using the old method to simulate the Sun would involve 10^57 atoms which is a 1 with 57 zeroes like this: 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000.
Early versions of the kind of technology that could be used: (see the first minute)
It could use generative AI similar to this from 9 months ago which can generate pretty realistic characters:
An AI from 2 years ago that could generate super realistic voices and laughs in realtime - and it can see through his phone's camera:
I am a fan of this old video of Elon Musk:
The possibility of being in a simulation, video game, or matrix...
lifesplayer.com
So I think there would be billions of cheap simulations in the future - using generative AI to generate the sounds, visuals, and other sensory information. It would usually involve one player and the rest of the characters would be AI generated but I just assume everyone is real anyway. Elon Musk thinks it would take less than 10,000 years for technology to get to that point.
A video about this scenario can be found by looking for
rick morty roy game on youtube:
Note that Rick and Morty video contains swearing. It also runs faster than real time so it takes minutes or hours to simulate a life of many decades. There is also another scenario where you begin with god like powers (easy to do in a simulation) and eventually decide to live a normal life where you forget your original identity.
I wonder, I wonder, what you would do if you had the power to dream at night, any dream you wanted to dream. And you would of course be able to alter your time-sense and slip, say seventy-five years of subjective time into eight hours of sleep. You would, I suppose, start out by []
web.archive.org
Note to be "indistinguishable from reality" like Elon Musk says, it would be impossible to 100% prove that it is a simulation.