This is hand-painted. If it is a photographic work, the highlights will have more details, such as the texture or texture of the sky, water and stones. There will be less details in the dark, such as the details at the arch of the bridge. Because the camera's tolerance is limited, and painting does not have these restrictions.
Surrealism painting can be as lifelike as photos. Some people can make photos look like hand-painting, but few people do it because it has no artistic value.