How does Photoshop interpret pixel data? Anti-aliasing is a way to eliminate the “jaggies” or “stair case effect” to make your images appear more smooth. Aliasing looks more like an 8-bit game. (see bottom image for comparison)
Anti-aliasing approximates the jagged line into varying opacities so as to appear smoother. This effect/filter is used in images, T.V. and video games. We will compare the two visually and then go even further by using Feathering. Feathering expands the blurred edge of a shape/image. This can be used to make vignettes for images.
1000×800 px files:
Make selections using Ellipse or Rectangle Marquee Tool at 0, 10, 20, and 50px. feathering. Copy and paste into first file Use the Lasso tool to make the same feathering selections. Copy and Paste examples into second file. Save and post example.