Filtering Approaches for Real-Time Anti-Aliasing
http://www.iryoku.com/aacourse/
Filtering Approaches for Real-Time Anti-Aliasing
Distance-to-edge AA (DEAA)
Hugh MalanCCP Games
Results
Distance to edge
Distance to edge
Distance to edge
Distance to edge
The postprocess
The postprocess
Results
Problems
Undersampling:
• Triangles thinner than a pixel• Long, thin triangles - eg a very long quad• Foreshortened triangles near silhouettes of organic objects, such as
characters• Subpixel gaps
No distance-to-edge information:
• Interpenetrating geometry• Shadow edges• Texture aliasing
Other uses for the DEAA buffer
• Simulate transparency with alpha-to-coverage
• Better alpha-tested edges, eg foliage
