Why is tunnel coverage so grainy/color noise?

[F1NN]

I was playing worldguessr and came across this…

1. Is It supposed to be grainy? Is that what the photo from the google car looks like?
2. I don’t know If Tunnels should be a reasonable thing to include as a guess, though it might be better as a setting you can turn on and off

Update on my worldguessr craze

[voidency]

backrooms 2.0

[Fish]

Not games fault, google maps camera cant go through tunnels without this issue. Once you get out of the tunnel, it would be normal again.

[ioi]

Maybe useful for identifying specific areas?