L'aube.

[bla bla 2]

MPVC

[Henry Blewer]

Try adding some lamps to highlight the planes structure; simulate the sun playing across the upper surfaces.

[airflamesred]

Looks OK - though lack of contrast in the image. As njeneb sais, or turbulance in the water maybe.

[Draigr]

The scene is very flat. Rotate the camera view around, brighten up the sun, or bring it out from the clouds. The landscape and water is currently very murky, make sure the sun is getting light to them. Or use something else to bright them up.

Generally, add a bit more complexity, and overhaul the lighting. Shouldn't be too hard.