An awful lot of the things hanging in museums look "bad" to me. I'm not just talking about the easily-mocked contemporary art. I mean things like Medieval paintings with Jesus painted as a baby-sized adult man. Everything before the development of perspective looks like a grade-school cartoon.
I'm sure you're right that reconstructions of painted statues are inaccurate. But I'm not sure that a good-looking reconstruction would be any more authentic. Cultural tastes vary a lot. I suspect that if we ever do get enough data for a valid reconstruction, I won't like it any better.
As a reference point to paintings in antique - these portraits from Roman Egypt are quite nice - from around 0 AD.
> An awful lot of the things hanging in museums look "bad" to me. I'm not just talking about the easily-mocked contemporary art. I mean things like Medieval paintings with Jesus painted as a baby-sized adult man. Everything before the development of perspective looks like a grade-school cartoon.
Perspective wasn't developed! The Greeks and Romans used it just fine, for example.
What was lost was artistic training because there wasn't sufficient economic market for it. As soon as you got sufficient economic incentive, art magically improves again. This is stunningly obvious if you look at Athens and then Pompeii and then Rome and then the Vatican (with the attendant backslide until the Renaissance as you note).
Interesting parallel to modern--will AI cause a huge backslip in art since the economic market for artists is being destroyed?
> An awful lot of the things hanging in museums look "bad" to me
Sure. But if have a chance to visit Pompeii, the author’s argument will land. The Romans made beautiful art. It seems odd that they made beauty everywhere we can find except in the statues we’ve reconstructed.