Unity 2018 Shaders and Effects Cookbook

How to do it...

The toon aesthetic can be achieved with the following changes to the shader:

1. Add a new property for a texture called _RampTex:

_RampTex ("Ramp", 2D) = "white" {} 

2. Add its relative variable in the CGPROGRAM section:

sampler2D _RampTex; 

3. Change the #pragma directive so that it points to a function called LightingToon():

#pragma surface surf Toon 

4. Replace the LightingSimpleLambert function with the following function instead:

fixed4 LightingToon (SurfaceOutput s, fixed3 lightDir,             fixed atten) {   // First calculate the dot product of the light direction and the   // surface's normal  half NdotL = dot(s.Normal, lightDir);         // Remap NdotL to the value on the ramp map  NdotL = tex2D(_RampTex, fixed2(NdotL, 0.5));   // Next, ...