Hey great picture! I believe its a digital composition. If its supposed to give a realistic impression iŽd like to give you some constructive critiques... Although the sun is bright it should be behind the clouds. The horizon should not end in a short distance - right? But it looks like it ends nearby. This comes from the clouds on the right "sinking" behind the waterlayer and the wood on the left that seems to be really near but is exactly on the horizon niveau..
I hope this is not misunderstood.. and maybe it just is supposed to look like it does or my impression of the image is false