Blenderベースの外部NPRシステム
"Little-R NPR" Renderer for Blender
https://www.blendernation.com/2017/10/25/little-r-npr-renderer-blender/
https://www.blendernation.com/wp-content/uploads/2017/10/yiming-wu-d6c-line.jpg
https://www.blendernation.com/wp-content/uploads/2017/10/yiming-wu-demo-2017-06-27-18-23-05.jpg

製図マニアにはたまらんな