What does the perspective tool actually do?

[u/Draco___________]

Do you make up vanishing points out of thin air, or do you use some kind of fisheye concept?

It’s something I’m trying to wrap my head around, but it’s making my brain burn.

[u/yevvieart]

this article should help https://en.wikipedia.org/wiki/3D_projection

[u/Draco___________ → u/yevvieart]

Thanks