I dunno---under your influence, I did once take an afternoon's exposure to make a sunprint that turned out to have the track of the sun in the image. It didn't really cause much bleed outside its track, so I wouldn't be surprised to find that a multi-day version would have several parallel tracks like we're used to seeing in pinhole solargraphs.if you use a lens'ed camera
it doesn't take a long time to get a retina image ...
( a photograph of "something" on the paper long exposure )
so i can't imagine how you would do this pointing at the sun
unless you make your own pinhole aperture and put it infront
of the lens to created a pinhole'd lens'd image ...
I don't remember what aperture I used, but I think the lens in question only goes down to f/32, so it certainly wasn't pinholesque.
Disclaimer: I am not advocating anything, all performers are trained professionals or pretending to be, don't try this or anything else at home, and please don't set your camera, car, spouse, or hair on fire.