The world seen with the naked eye, is the light world in which the reflections of all things interact with each other.

The first GeForce RTX 20 GPU series equipped with the latest technology of ray tracing, which can calculate it in real time and can reproduce it is amazing. Real-time ray tracing where premonition, that seems to be the next generation graphics card standard will be premature.

The next-generation technology of Ray Tracing. It is a method of tracking the movement of a photon that moves rays literally. It is aiming at reproducing the virtual world indistinguishable from reality. It is easy to say, but in movies and games, especially light sources and objects hit by light are constantly moving around, so a huge number of calculations are necessary. Implementation is not easy.

The history of ray tracing is old. However, accuracy and processing speed, Nvidia 's new GPU has passed the next generation.

In ray tracing, instead of tracking the movement of light from the light source, you follow the light moves from the eye of the final destination to the light source in reverse. For each scene, while calculating based on the quality, size, distance to each other, angle to the light source, etc. of objects entering the field of view.

In the ray tracing algorithm above image, all elements for all objects entering the field of view and also analyze the light source hitting the object. In addition, since light is reflected and tertiary reflections repeatedly proceed like a nest, it is increasingly difficult to calculate every several million pixels.

Real-time ray tracing realized with the Turing GPU architecture. Nvidia is putting forward at the next generation card "RTX" series which turns into GTX. Let's see with the first game "Shadow of the Tomb Raider". Where the shadow becomes completely shadowed with backlighting, it is a difficult scene to reproduce if it is not ray tracing.

The new RTX card, ray tracing is divided into " light ray tracing " and " shading ", and the RT core is specified to increase the processing speed of the former raycasting. The processing performance and the visual improvement range also depend on the placement of each scene and the amount of other processing.

With the introduction of the first consumer graphics card "RTX 2000" series which implements the hardware for ray tracing, real-time rendering is finally starting full bloom. Shadows, reflections, and expressions of light are old in games, but without relying on simulations of approximation, one particle has been calculated correctly and it reaches where it can be reproduced in real time.

The RTX series is released on September 20. According to the pcworld, it will not work without Microsoft's DirectX Raytracing API, so it will take about a month to release.

The ray tracing revolution. It seems excited.

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