That's what I don't understand, the tiny swirl at the top.

In povray, it renders perfectly, and with shaders at least, the quality should be similar.

And actually the straight thin line is pretty impossible.

Theoretically, my head would do that, but if you lp it, you can see the jagged part.
If you take the image and pov-ray it, it is fixed.
Irks me to no end

lol, I actually find hands and feet to be harder, but just due to the extra resizing you have to do XD but that's my own laziness speaking