Sunday, January 15, 2023

Real-time ray tracing

In video games and other 3D applications, real-time ray tracing enables more lifelike lighting and shadows. By following the course of light rays as they interact with objects in a 3D environment, it realistically simulates the behavior of light. This may lead to reflections, refractions, and overall illumination that are more realistic.

Traditional rasterization, the method used to create 3D visuals on a computer, approximates how light interacts with surfaces in a 3D world using a set of mathematical equations. However, it is restricted to the use of pre-calculated lighting and shadows, which might lead to less realistic graphics because it cannot precisely imitate the behavior of light. The lighting and shadows produced by ray tracing, on the other hand, are more accurate since it estimates the path of light rays as they interact with surfaces in a 3D world.

Real-time ray tracing has typically only been usable for offline rendering because it is a hard process that needs a lot of computational resources. But as hardware and software have developed, it is now possible to use real-time ray tracing in games and other applications, enabling more lifelike graphics to be displayed in real-time. Though it is still a relatively new technology, there are still few games that use it.

Real-time ray tracing can be used in games, but they must be made to take advantage of it, and they need a compatible graphics card, such one from Nvidia's RTX series, to do so.

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