The Last Unicorn - skulls

I am currently designing the last unicorn book cover. I still want the skull idea in the middle of the book but have hit a problem as I cannot do realistic painting on Photoshop very well. I drew out the skull, scanned then redrew again on Photoshop. The results was not very good.

Looks good for art but not for book cover

As this was a problem I looked for a solution. I love geometric designs of portraits (You can find it on my behance) giving them unusual colour. I haven't done a skull before so I gave it a shot.

Geometric skull

I like the geometric design with the different shades in large shadow areas. I will need to work on it such as adding cracks and lining up each shape. I will then place on the front cover of the book. May change the background colour of the book as I think red looks too rich against the skull.