Okay. I put them in the same frame just for those who have questions on how I get these drawings done so fast and with good accuracy and detail.
In the WIP I started by making the circle for the upper cranium.
Then I used my pencil kinda like a sword and quickly slashed out its general shape and structure (This only works if you are good at positioning and proportions)
The 'slashing' technique as I call it saves allot of time on fine tuning lines. You can get the base line art done in nothing flat.
Once that was done I used my Ref to quickly start using the slash lines to build the image. (with my pencil)
I erase all lines till their just a ghost so I can see the frame of it. Then I add the 'meat' so to speak, onto that frame.
Shading is done with light and heavy touches.
Thats how I do.