yeah it looks very nice, I wish you put some warmer color into that scene and bring out a sun a little bit, it feels like we are in London or somewhere where is cloudy rainy etc. You've got there a tropical island, so bring some heat to it, a volcano showing of particle system would be good and some hotter colors, sun and cool shadows would lift this scene to the next level and you want that cos that sells your software, you know that :)