I think it is the 3rd dimension
Music from the Romantic period or era (1850-1900) is characterized
by personal, emotional and expressive style and composition. The melodies and
lyrics of music from this period evoke more emotion than other styles of music.
Compositions from the Romantic era of music revolved around themes of: nature,
the supernatural, magic, dreams experiences of love or negative feelings and so on.
Answer: According to Hockney photography has it limits as it cannot capture time. He explains as it only has a singular point of view, and that photography is only good for mechanical reproduction.