At the Black Swan sim one can now see an amazing work.
It's a large (perhaps three times life-size) photorealistic 3D figure of an odalisque in the artistic sense of the term. Like the many paintings, this odalisque is in repose, though this one is blissfully asleep.
It's a technical tour de force, but I fear it requires its darkened room surroundings to look as good as it does. SL has yet to even get basic shadows save as an experimental feature, much less skin and hair that realistic.
You really should see it in person, but here's a photo I took:
We look like bad CGI cartoon figures gazing upon a human.
I hope that someday avatars will look that realistic.