Radeon HD 6950 & 6970 review

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Additional Anti Aliasing modes

 

Additional Anti Aliasing Modes

Enhanced Quality Anti-Aliasing (EQAA)EQAA is an updated anti-aliasing option now available on the AMD Radeon HD 6900 series. It offers enhanced quality over standard Multi-Sample Anti-Aliasing (MSAA) modes by doubling the number of coverage samples per pixel, while keeping the same number of color/depth/stencil samples. This technique offers smoothing of aliased edges without requiring additional video memory, and with a minimal performance cost.

AMD Radeon HD 6900 series

Morphological Filtering (MLAA)

Another recently introduced technique is morphological, which works as a post process effect. In other words, you finish rendering each frame, yet before presenting it to the display, your card now runs it through another shader pass to perform some filtering. This differs from traditional multi-sample and super-sample AA techniques where the filtering occurs during the rendering of each frame. In fact, this technique can eliminate aliasing for still images, though its intended to work better when in motion. MLAA can be enabled via the All enabled 3D settings tab within the AMD Catalyst Control Center.

AMD Radeon HD 6900 series

The filter works by first detecting high contrast edges with various pixel sized patterns that are normally associated with aliasing, and assumes they should actually be straight lines that are not aligned to pixel edges. It then estimates the length and angle of the ideal line for each edge, and determines the proportional coverage by the lighter and darker color for each pixel along the edge. Finally it uses this coverage information to blend the colors for each pixel.
 

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