Alien skull sketch
The process for this started with laying down a rough shape with a cotton ball and black pastel chalk, I then use a cotton bud to refine the shapes before using Staedtler Mars black pencils. (4B,8B)
To finish the drawing I use a Derwent charcoal pencil, and an eraser for any highlights.
Referral links to sites I use to earn extra crypto
Mine Bitcoin from a crome style browser