Your rendering made it appear 3D in the thumbnail, very nice.
However, three things I want to critique:
The clouds look a bit too solid. Especially the bottom planes.
It doesn't look like sunlight is coming through, even though there seem to be only a few clouds to be floating around.
The fish on the Fox's Fishing Rod is beeing reeled in fresh, but there is no droplets in the air. You also can't tell where the fish came from on the water surface.
Overall a wholesome piece.