Learn how to create cartoon-style non-photorealistic rendering effects.
- Understand the basics of non-photorealistic rendering
- Learn how to quantize lighting values for cartoon effects
- Master using step functions to create hard boundaries
Characteristics of toon shading:
- Clear light-shadow boundaries
- Limited color gradations
- Flat lighting effects
- Hand-drawn animation style
Convert continuous lighting values to discrete levels:
`glsl
float lightIntensity = dot(normal, lightDir);
float toonLevel = floor(lightIntensity * levels) / levels;
`
Use step() function to create clear light-shadow divisions:
`glsl
float toon = step(threshold, lightIntensity);
`
Create a cartoon-style shading effect with clear light-shadow layering.
1. Calculate basic diffuse lighting
2. Use step() or floor() functions to quantize lighting values
3. Define 2-4 lighting levels
4. Assign different color intensities to each level
5. Optionally add simple outline effects
You should see a cartoon-style 3D surface with clear light-shadow boundaries and flat color gradations, similar to animated cartoon visuals.