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Anti-Aliasing Techniques
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Supersampling Anti-Aliasing (SSAA)
SSAA works by rendering the scene at a higher resolution than the display and then downsampling to the display resolution. It takes the average of multiple samples per pixel to produce a smoother image.
Multisample Anti-Aliasing (MSAA)
MSAA samples multiple points for each pixel, but only for the polygon edges, not within the polygon. It uses the same sample for covered pixels to reduce the processing power required compared to SSAA.
Fast Approximate Anti-Aliasing (FXAA)
FXAA is a post-processing effect that smooths jagged edges by analyzing the image and blending pixels. It's fast and doesn't require large amounts of memory.
Temporal Anti-Aliasing (TAA)
TAA combines samples from the current and previous frames to reduce shimmering and flickering in motion. It leverages temporal coherence by accumulating sample data over time.
Subpixel Morphological Anti-Aliasing (SMAA)
SMAA targets subpixel coverage to smooth edges and is a post-processing technique like FXAA, with the advantage of addressing subpixel artifacts without significant performance impacts.
Coverage Sampling Anti-Aliasing (CSAA)
Developed by NVIDIA, CSAA increases the number of coverage samples per pixel, improving upon MSAA by providing higher quality without the same increase in memory that comes from additional color/z samples.
Adaptive Anti-Aliasing (AAA)
AAA is a technique that adjusts the level of anti-aliasing by detecting areas that need higher sample rates. It typically applies supersampling adaptively to complex regions in the image.
Enhanced Quality Anti-Aliasing (EQAA)
Created by AMD, EQAA enhances the quality of MSAA by providing more coverage samples than color samples, improving edge quality with minimal impact on performance and memory footprint.
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