The main characteristic of toon shading is the way the light is rendered; surfaces are not shaded uniformly. To achieve this effect, we need a ramp map. Its purpose is to remap the Lambertian light intensity NdotL to another value. Using a ramp map without a gradient, we can force the lighting to be rendered in steps. The following diagram shows how the ramp map is used to correct the light intensity:
Get Unity 2018 Shaders and Effects Cookbook now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
Get Mark Richards’s Software Architecture Patterns ebook to better understand how to design components—and how they should interact.
Dive in for free with a 10-day trial of the O’Reilly learning platform—then explore all the other resources our members count on to build skills and solve problems every day.
Start your free trial Become a member now