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I have implemented a Geometry-based Antialias (GAA).
Using fins geometry that is usually used to render NPR outline for characters, I used it to smooth out edges.
The main advantages of this technique is perhaps more pleasing results to the eye, no blurring of texture due to AA the whole screen and also few pixels used to draw the AA geometry.
The screenshot you see is an image from the game Labyrinthica: The quest of lima, scaled up with no interpolation. It uses GAA to smooth the edges.