The One Where Joey Speaks French - S10-E13
Visible crew/equipment: When Joey is calling Phoebe after she walked out of his apartment, the shadow of a camera can be seen on Monica's door. (00:08:05)
The One Where Joey Speaks French - S10-E13
Visible crew/equipment: After Rachel tells the others that her father had a heart attack and Ross takes two of Monica's cookies, when it cuts to the shot of Central Perk it's from a low angle, and the studio lighting rigs at the ceiling can be seen through the windows.
Answer: The painting doesn't have a name, and if it does it is never mentioned in this episode.