I think henrymop was responding to the lack of weathering in the textures of the woodwork on the columns, the rails, the eaves and the bench. As an example, look at the floor, the plant and the background, try to ignore the woodwork. Looks pretty good. The weathered floor texture makes a good match with the plant and the background. The woodwork, while excellently modeled, looks like it just got a primer coat and the painters will be back any second to finish the job. In short, the porch needs to show some effects of the weather. The bench should be a different color, even if it’s just a different variety of white. Ditto the eaves, the gutter, and the foundation. Also, the bench appears to be wood slats on a steel frame. Even if the whole thing is painted (and it should be, exposed as it is to sea air) reflections off painted metal are different than reflections off painted wood.
This is going to be a really great piece when you’re finished!