Shading refers to depicting depth perception in 3D models or illustrations by varying levels of darkness.
https://en.wikipedia.org/wiki/Shading
Robotics Sword Cave Shading
Because some cyborgs need swords apparently
His face Il visage Face Portrait Shading Brown Nose Pink Peach Petal Ear Head Skin Finger Lip Neck
"As a professor of science, I assure you we did, in fact, evolve from filthy monkey-men."
Ichiro the Cyborg Swordsman
thewalkingdudeRobotics Sword Cave Shading
Because some cyborgs need swords apparently