Working with Views > 3D and Schematic Illustration View > About Cel Illustration Render Mode
  
About Cel Illustration Render Mode
Select Cel Illustration render mode to display all parts of the viewed representation using the cel-shading illustration technique. This gives the image a hand-drawn, or cartoon-like, appearance, for example:
Cel Illustration render mode example
Two cel-shading palettes are available in Cel Illustration render mode:
Fixed-range black and white, or classic cel-shading
Smooth yellow/blue blend, or “Gooch” shading