Mabe some tweaking with the sun control will help. If ambient light balance is set to more from sky, more shadows will be visible under the vegetations. If light balance is set to more sunlight, the transitions between light and shadows will be more obvious. Also tweaking with the ambient light color "lum" could do a miracle!

Here comes my wishlist. 1. More realistic clouds (Clouds are darker at the center or where they are more massive and PUFFY CLOUDS THANKS) 2. Clouds cast shadows on ground (Like in Terragen) 3. and the splashing waves sound good. 4. More plants and vegetations to be enclosed with the software. :)