The One With Joey's New Brain - S7-E15
Continuity mistake: When Rachel appears when Joey has the actor in his appartment, the door is closed. When she goes to get Monica, the door is open. (00:21:30)
The One With Joey's New Brain - S7-E15
Continuity mistake: When Chandler, Ross and Monica are in Central Perk discussing playing bagpipes, and Ross says, "Decide whatever you want," he is gesturing with his right hand up and with an open book in his left hand. When the camera angle changes, the book is closed and is now in his right hand. (00:15:30)
The One With Joey's New Brain - S7-E15
Continuity mistake: When Joey is talking to the woman whose brain he receives, as the shot changes she is holding a glass, then a cigarette then a glass again, with no time to change objects, let alone anywhere to put the other. (00:06:05)
Answer: The painting doesn't have a name, and if it does it is never mentioned in this episode.