*** This is not a anatomically correct representation of a skull, it is just a Biker type metal skull.***
This drawing pretty much pushed my limits to the max, 90 hours of intense concentration throughout, well except for the last 30 minutes which was pure blizz.
Done for a friend who ordered it.
Drawn on Canson Dessin paper A4.
4h-9xxb and 0.3 b mechanical.