Coverage Sampling Anti-Aliasing (CSAA) Explained

CSAA produces antialiased images that rival the quality of 8x or 16x MSAA, while introducing only a minimal performance hit over standard (typically 4x) MSAA. It works by introducing the concept of a new sample type: a sample that represents coverage. This differs from previous AA techniques where coverage was always inherently tied to another sample type. CSAA reduces bandwidth and storage costs.

http://news.developer.nvidia.com/2007/01/coverage_sampli.html


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