The One With The Dirty Girl - S4-E6
Visible crew/equipment: When Monica's explaining why she turned down the catering job, the large studio lighting is reflected on the TV when she tells Phoebe how much money she needs. Then just as Joey and Kathy walk in, the camera can be seen at the left side of the screen.
The One With The Dirty Girl - S4-E6
Visible crew/equipment: When Rachel says, "And not a coupon for an hour of Joey love," the stage lights are reflected in the tv. (00:04:50)
The One With The Dirty Girl - S4-E6
Visible crew/equipment: When Monica leaves the kitchen into the next scene, the boom mic is visible at the top of the screen above the kitchen door for a short period of time. (00:07:40)
Answer: The painting doesn't have a name, and if it does it is never mentioned in this episode.