The One Where Rachel Has a Baby, part 2 - S8-E24
Visible crew/equipment: After Rachel asks Joey to get the other box of tissues under Ross' coat, when Joey drops the ring box then picks it up and opens it we can see the end of the hospital set floor and wall, behind the chair.
The One Where Rachel Has a Baby, part 2 - S8-E24
Visible crew/equipment: In the very last shot of the episode, as Ross is walking down the hall, stage lights are visible at the end of the hallway.
Answer: The painting doesn't have a name, and if it does it is never mentioned in this episode.