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What is the throwing of rays? And why is it such a big deal

With the release of the NVIDIA RTX series, the world of the game has been introduced into the concept of throwing rays part of our daily lives. The next consoles of Sony and Microsoft both promise ray tracing solutions, and AMD also plans to bring its own method of tracing from its GPUs. What is the throwing of rays? And what does it mean for you? This article is designed to be a quick introduction to ray tracing. There is a link to a very technical explanation for those who wish to know more about the process.

What is the throwing of rays?

The easiest way to describe the ray throw consists in a more realistic way to restore shadows and lights in a video game. Traditionally, the launch of rays has been used at cinema and television to produce incredibly realistic lighting in computer-generated scenes. The visual effects in the films, but not in the games, are due to rendering differences. The film scenes can be rendered over time, using powerful equipment, while games are limited to equipment available for the consumer and the need to return everything in real time.

As a result, games have used a process called rasterization to display three-dimensional objects on a two-dimensional screen. The process is fast, easier to make the department throw and can be used to give a fairly accurate and often very pretty approximation of the behavior of light and shadows in a scene. For a more detailed explanation of the operation of the pixelation, I would suggest this excellent techspot article. Be notified, it is very dense technically.

RaiderZ in 2021

The launch of rays differs from the fact that it seeks to reproduce the true behavior of light in a 3D space. At the most basic level, the launch of the rays makes it possible to follow the light of the source through a 3D space, taking into account the way in which it reaches on all the surfaces with which it is in contact. As you can imagine, so far, this task requires a lot of calculation time and exceeds the capabilities of the game material.

The solution to this problem in games is more powerful equipment and intelligent means of approaching ray tracing. In the games, rather than throwing rays on an environment, the launch of rays only concerns the light visible by a virtual camera, in this case the field of view of your character. There is also a limit to the exact number of light rays that will be traced, and some games have used a combination of throwing rays on objects having a visual impact and pixellization on the rest of the scene.

Although all this sounds good, the throwing of rays is still a nice niche in the games and there is still a lot of work to do before the cards currently available can offer the benefits of the launch of rays, while maintaining rates and High resolutions. that many modern players require.

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