Full Scene Anti Aliasing (FSAA) - Full-Scene anti-aliasing (FSAA) is a sampling technique that creates more detailed and realistic looking images, by removing the stair stepping effect seen on the edges of objects within computer generated images. High quality anti-aliased graphics are achieved with sub-pixel edge detection and color compression for greatly improved performance. Full scene anti-aliasing modes 2x/4x/6x
Anisotropic Filtering - Anisotropic filtering enhances overall 3D quality by rendering sharp, detailed textures. As more texture samples are filtered, the image quality improves. Without Anisotropic Filtering, objects and environments in the 3D world will appear blurry and fuzzy, effectively degrading the level of realism. Anisotropic filtering improves image quality by sampling textures more frequently. This is particularly important for objects rotated at sharp angles relative to the viewpoint. For example, textured flat ground in the distance and scenes with rotating 3D objects in the foreground will both benefit from anisotropic filtering, and are typically found in today’s gaming content. The R300 VPU filters more samples than the competition, with minimal performance degradation. Anisotropic filtering modes 2x/4x/8x/
Flight sim uses Direct 3D not Open GL. Sturmovich however allows you to use either of these - Open GL is much faster on this game - 40% greater frame rate, at least on my machine. Of course Open GL is not a Microsoft standard which is probably why it is so good!