Bouguereau's nudes are okay, but I prefer paintings like his Petites Maraudeuses--1872, Au Bord du Ruisseau--1875, Petite boudeuse-1888, Calinerie-1890>Le Goûter--1895, and some others showing clothed people.
Not that I'm opposed to 'nekkid chick paintings'--Bouguereau's Le Printemps--1886 (obvious homage to Botticelli) is very nice, for example. For the most part, though, I think his non-nudes are more to my artistic taste.
Not sure I count that as art ~ more on the order of colorizing a photograph.
We caught a painting where Van Gogh had done that for part of the work. As I recall it's one of his early paintings of a beachfront home ~ may be in the Getty in LA or Carnegie-Mellon in Pittsburgh (we visited both within days of each other).
It was all pretty obvious to the discerning eye. Obviously someone had been beating on Van Gogh's head to "do something realistic and detailed", so he did.
My favorite Picasso paintings and drawings are available at: