1. NPR & Screen Effects
Renguo Feng

2. Non-photorealistic rendering
Cartoon rendering can enhance the atmosphere of some types of games when you want to impart a cartoonish feel.

3. Cartoon rendering
Step 1. the meshes are shaded using exactly three shading intensities (bright, medium, dark) and the transition between them is abrupt.
Step 2. Cartoon drawings also typically have their silhouette edges outlined.
Both steps require their own shaders.

4. Cartoon rendering

5. Difficulties
To outline the silhouette edges， I represent an edge of a mesh as a quad.
The problems in generating adjacency arrays for some complex models.
quad from an edge
triangle

6. Screen Special Effects
Render scene to a temporary texture, and then use a special shader to manipulate the result before presenting onto screen.
Black and White, Old Film
Gaussian Filter & Blur & Motion Blur
Shader Development Tool

7. Black and White, Old Time Movie

8. Blur & Sharpen

9. Distortion(heat haze effect)

10. Progress & Difficulties & Future Work
Part of codes for post processes
Many shaders, test variables
DOF, Motion Blur ……