Frozen Lake

Hmmm, new Terragen thing...
Ok, this time I didn't you any presets, I've done all the things myself. Espacially for the snow, because I wanted a really moutain snow, like it just snowed... Didn't really manage it, but at least it looks a bit better than if i wouldn't do anything, so...
Some problems with the light, too, please, tell me what I can improve there, I'm really bad at it...
And yeah, tell me all the things I can change to make it better, I so want to improve my technics...