ssersoz writes:
Grease Pencil From Mesh is a popular Blender add-on for converting mesh objects to full color Grease Pencil objects with edge filtering for sharp edges, intersections and outlines.
Now with version 2.6 introducing Grease Pencil Shadows & Highlights plus Curves Output!
For the new features and improvements see the video below:
Download links for the free and paid versions:
Blender Market
Gumroad