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SSAA
An anti-aliasing method that renders the whole image at higher resolution then shrinks it for smooth edges.
Supersample Anti-Aliasing draws the scene at several times the target resolution and averages neighboring samples down to the final size, smoothing jagged edges everywhere in the frame. It gives excellent quality because every pixel — not just edges — is oversampled, but it is expensive since shading runs many extra times. MSAA is a cheaper approximation.
See also
- sample-rate / per-sample shadingRunning a pixel's shading calculation separately for each anti-aliasing sample instead of once for the whole pixel.
- screen-space derivativeHow fast a value changes from one pixel to the next on screen, computed by comparing neighboring pixels.
- scanline rasterizerThe engine that turns triangles and shapes into pixels by filling them one horizontal row at a time.