So, here's my Exotika entry. I used partly the technique Smoggy posted on Ashundar for deep snow with something bpauba came up with to get this effect.
I've included all of the standard wallpaper sizes in the .rar file. If you would like a dual screen or wide screen wallpaper size it will be available soon.
All of the wallpapers are without any text for your viewing pleasure.
This was approximately a 10 hour render with a 200 mb psd sized at 3000x2400 px.