Great terrain and lighting, Henry. You should pursue this one. Like Frank says, play a little with color enhancement. Although I must say, your enhancement, Frank, is too hard (for my monitor anyway). Whites are bleached, darks are too black. I also must say that I don't really like the very harsh images. In natural environments there is always a little haze that gives the blacks a little grey, even at small distance. Softer for the eyes, and enhancing images needs careful manipulation.
