[Software] Antialiasing: ¿Cómo mejora los gráficos de los juegos?

[[M]anuel]

What is Aliasing?
Aliasing is an effect that occurs when drawing images digitally, these images are represented by pixels that can sometimes show saw teeth at the edges. This effect also occurs in games, since the images are drawn digitally. But there are methods to prevent these saw teeth from appearing, these are called AntiAliasing filters. In this guide we are going to tell you how Anti-Aliasing improves the quality of games.

Games, just as they improve the FPS through scaling techniques based on algorithms or artificial intelligence, can also improve this type of effect that occurs when drawing lines in very fast moving images, this we call AntiAliasing. Anti-Aliasing is intended to reduce the saw teeth in the images by smoothing them. Let's see what it consists of.

Image smoothing
Aliasing is an effect that has been around since 3D games began. When you draw lines or objects quickly, they do not represent the edges exactly, since images are represented by tiny boxes called pixels. As the frame rate increases, the Aliasing is an effect that is more accentuated, since the graphic must represent the images more quickly.

When we use a higher resolution in games, this effect is reduced. By using more pixels to draw these lines the effect is greatly reduced. We could turn up the resolution until it disappears, but this would require very high graphics power. We also have the problem that, with higher graphics resolution, the FPS speed decreases considerably.

For this there is AntiAliasing, this technique will hide the saw teeth that draw the images when they are processed quickly or with lower resolution. There are several methods, from older and rudimentary to modern algorithms that have been developed by the manufacturers of GPUs optimized for their own hardware.

Let's see what these methods are and how they work.

Types of Antialiasing
We will begin by looking at the different techniques used to perform this edge smoothing that appeases the sawtooth effect or aliasing that appears in games. There are very old and effective methods, but with current technologies they have become outdated and have been improved or added others much more optimized for more modern hardware.

SSAA or SuperSampling Anti Aliasing
Also known as full scene anti aliasing or anti aliasing supersampling. It is a very old method that consists of rendering the game images at a higher resolution and then adapting them to the resolution of the monitor. Here the closest neighbor technique is used, it consists of obtaining the pixel that is around and performing the arithmetic mean to reduce the size of the image.

 

LINK:   https://www.geeknetic.es/Guia/2171/Antialiasing-Como-mejora-los-graficos-de-los-juegos.html