Tutorial available for download from http://www.thegnomonworkshop.com/store/product/1138/#.Va_6DSpViko
Step 1: Don't forget your power bracelets. Step 2: thumbnail design stage
Step 3: Blow up thumbnail, print, pencil in linework
Step 4: Scan. Open in Photoshop. Lay in rough color/value
"Blood Eels of the Siren's Ossuary" Tutorial available from The Gnomon Workshop. Pencil and Photoshop
Step 5: Render, monkey. Render
Step 6: Finalize details. Refine mood
Step 7: Post to Art Station