very nice. Honestly fooled the eye except for the foreground needs something. ground cover or something. The 'rock' has that artificial look. The clouds and water are great.

This works! Your pearl of blinding sun falls perfectly on the water and the shadows respect the sun's angle. Well done. Also, it's very beautiful.

First off, please bear in mind my comments come from a photographer's viewpoint. I am not familiar with what is involved in creating computer imagery. Your composition is quite good as is your shadowing, which seems very natural. What I miss is some saturated color in this landscape, in the forefront, with a fade towards the back. And, maybe a little more color in the sky. Overall though, really good design.