UPDATE: If you're experiencing problems with this shader in 2.93LTS, please download the v4b update. I've re-configured the node trees and they should work great in the updated version.
UPDATE: A small upgrade has been added. The sketchlines and halftone node groups have been reconfigured to be lighter. Download version 4a from your file library.
This easy-to-use set of shader node groups will help you quickly produce comic-style materials in Blender 2.83+ using the Eevee render engine.
Note: the previous version is still available as a download.