Skull

All of the four main wallpaper shapes are catered for, as usual. You can use MSPaint if you want to shrink-to-fit.

The rays behind the skull are modified from Windows Vista Ultimate wallpaper, so that's why it's in the Mac and PC OS section of 'Wallpaper'. (The skull's of my own design.) It doesn't really fit in any of the other categories... Abstract? No. Macabre & Horror? Not macabre or horrific enough. People? Well, part of what used to be a person was used as a model...