PPTX

Report
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 Malan
CCP Games
[email protected]
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

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