If you were close enough to see one with the naked eye, what would you see? Would you see a "black hole" in the center of the accretion disk? Or would any view of the black hole itself be completely obscured by light emitted by matter near the black hole as it's torn to shreds by tidal forces? Would you be able to see the jets at the poles with the naked eye? Would intense gravitational lensing distort or color stars in the background? Does anyone know of any artistic renderings of what a black hole would look like to the naked eye, that lean more toward scientific accuracy and less toward dramatic Hollywood glitz?