I wanted to test out 3DCoat's voxel sculpting a bit more so I made a skull. I have a piggy bank that is cast from a medical skull so I used that as reference. It has some anatomical and proportional issues, and the underside is not finished at all, but I was sick of staring at it so I did a quick retopo and threw it into Modo to play with some more rendering stuff.
Modeled in 3DCoat. Rendered in Modo.