Fast Approximate Anti-Aliasing (FXAA / Fast Approximate Anti-Aliasing)

Fast Approximate Anti-Aliasing (FXAA / Fast Approximate Anti-Aliasing) is a technical term that is extremely important in game graphics rendering and optimization (technical art). An explanation of the extremely fast and ultra-lightweight post-processing type anti-aliasing technology that detects ``jagged borders'' pixel by pixel based on contrast differences in the final screen (one image) after drawing is completed, and blurs the color slightly with the surrounding area to blend it in.

Real-world analogy: Instead of redrawing the jagged edges of the picture in detail, speed retouching involves ``lightly rubbing (blurring) only the jagged areas with your fingertips' on top of the finished picture to make them less noticeable

FXAA is ``a smart image editing filter that looks only at the single completed screen photo without looking at the mesh structure or depth, uses image processing to instantly detect areas where the color boundaries are jagged in a step-like manner (jaggies), and blurs the border color by slightly 'blending' it with the surrounding area.'' Since all the troublesome data processing of 3D is bypassed, the weight is almost "nothing", and even the weakest terminal can be used at lightning speed with almost no penalty, mildly softening the sharpness of jaggies.

Detailed mechanism and operating principle

Set the camera's "Anti-aliasing" setting to "Fast Approximate Anti-Aliasing (FXAA)". This applies a super-fast blur filter to the final image after the entire screen has been drawn.