On the subject of eyes; I find that even those who do try to pose their figures looking at something other than infinty, still fail to grasp how binocular vision works. The leading eye looks directly at something, the other triangulates. It's suprising how much difference getting that right makes to an image, particularly if the figure is close to the object of their attention.

Problems I have with spinning black holes; how can an infinitely tiny object be said to spin in any meaningful way? Also, if matter (lint or otherwise) close to the event horizon starts rotating with the black hole - as I've read that it would - surely the effect of centrifugal force would tend to decrease the escape velocity for said matter, thus reducing the event horizon around the equator, not increasing it as the textbook diagrams show?

John the terminally puzzled