Blender: Enhance Realtime Toon Shading
Channel: Light BWK
Date: 2015-10-29

How to enhance a texture based shading for realtime with BI's material nodes.

Key points: 
1. Think in pixel math 
2. Solve shading problem with layers paradigm

Pixel Math ebook: https://blendernpr.org/store/?page_id=2318

Model by Max Puliero
You can see his explanation on how to do realtime outlines.
https://www.youtube.com/watch?v=D4T1cDJryOI

Model download: https://www.dropbox.com/s/da5sbie44v6xvk9/ChibiRyuColorFixed.blend?dl=0