I usually make my own wallpapers. Normally some pattern, or subtle background. Sometimes I just want one themed to the holiday. So I went ahead and made one! Did a quick model in 3Ds Max, multipass rendered it with diffuse, glare, and z-depth. I rendered it in Mental Ray using photometric lights (so it took awhile, I kept the settings cranked high) Then some quick post in Photoshop.
Below you can find the passes that I combined with the usual default output from mental ray.