"Black Wukong" real-life demonstration explodes, NVIDIA shows off light tracing technology

After a year, "Black Wukong" is back and once again on the hot list.

#This time, in addition to the official release of a 6-minute live plot clip, NVIDIA also brought an 8-minute live trial clip.

What’s more important is that this is the first time that “Black Wukong” supports 4K RTX ON ray tracing NVIDIA DLSS technology.

#Netizens’ blood boiled instantly after watching it.

The first 4K light chasing DLSS

In 2020, Black Wukong was exposed for the first time, shocking the world.

In 2021, the test of UE5 will be shown, and the snowy ground scene processing will make netizens call the graphics card Crisis China Edition.

#In 2022, I went directly to NVIDIA 4K RTX ON.

Let’s compare the scene where Wukong turns into a golden cicada at the beginning. This year’s wing modeling and flying movements are obviously more textured than the 2020 version.

#With the blessing of light chasing, different positions of Jin Chan’s body will also show different details based on different lighting angles, making it appear more realistic and natural.

Clearly, AI technology and ray tracing technology are changing the way we game and create.

From a technical point of view, ray tracing and DLSS have become standard equipment for producing AAA game masterpieces.

The reason why "Black Wukong" allows players to experience such an immersive fantasy world of Chinese mythology is because of its powerful ray tracing and NVIDIA DLSS , all powered by GeForce RTX technology.

NVIDIA RTX is at the forefront of the current revolution in gaming, the fastest, most advanced platform for cutting-edge applications and games.

If players use a GeForce RTX-powered PC and optimize it with the latest Game Ready driver, they will get the most powerful performance and the smoothest gaming experience experience and the highest fidelity ray tracing effects.

A milestone that subverts the gaming industry

Next, let’s introduce ray tracing and DLSS in detail.

On August 14, 2018, SIGGRAPH, the top computer graphics conference, was held in Vancouver. NVIDIA officially launched the world's first new graphics card family that supports real-time ray tracing technology. NVIDIA Quadro RTX.

On August 21, NVIDIA released a new generation of graphics cards based on the Turing architecture: GeForce 2080Ti, GeForce 2080 and GeForce 2070. Since then, GPU has opened up a new world of ray tracing for games.

#Real-time ray tracing technology and DLSS technology can definitely be regarded as milestone disruptions.

1. Ray tracing technology

Ray tracing is A graphics rendering method that simulates the physical properties of light.

#Before the advent of ray tracing, the traditional method was raster rendering.

Assume there is a room and a light source. From the inside of the room, give each surface a plane texture, and make each surface brighter or darker according to the position of the light source. First, Calculate the coordinate transformation (matrix transformation, perspective, etc.) of the object (room) corresponding to the polygon or triangle vertices on the screen, then fill the texture within the polygon or triangle, and simultaneously calculate the color of each pixel in the room, thereby generating a fairly realistic 3D Room.

The principle of ray tracing is to track the propagation behavior of each ray of light and calculate the effect of each ray of ray on our human eyes. The contribution value of the observation, that is, the color value. Rendered using ray tracing technology, the emitted light bounces around the scene just like it would in the real world, so it looks more realistic. It calculates where the light intersects the room and how much it should reflect, how the light passes through the virtual camera's lens, and finally, determines how the camera's image should appear on your screen.

Calculate and simulate to obtain information such as the color of each pixel projected onto the screen.

#Ray tracing is the reverse tracing of light from the camera (eye) to capture the various effects of light reflection.

Rasterization (left) and ray tracing (right)

In the game, a specialized light tracing (RT) core is used to simulate the physical changes of light in the game scene.

It can achieve physically accurate shadows, reflections and refractions, and global illumination in virtual game scenes. , making objects in the game more realistic.

#For example, the light and shadow changes in Black Wukong’s demonstration.

Also scenes such as flames, smoke and explosions look more realistic, making people feel like they are there It feels like it’s all the effect of light chasing.

#########In fact, the algorithm of ray tracing technology was proposed by Turner Whitted as early as 1979. Why did it take so many years to start using this technology for light rendering? This is because the amount of calculation required is too large. ##################In order to ensure the huge computing power demand, NVIDIA has an RT CORE in each SM unit in the Turing architecture, specifically for ray tracing services. The working principle of RT CORE is the hierarchical bounding box traversal algorithm: BVH (Bounding Volume Hierarchy Traversal). ##################For example, the rendering object is a rabbit. To calculate the interaction between a light ray and the rabbit itself, divide the space where the rabbit is located into N bounding boxes and calculate the light rays. Which bounding box does it intersect with? If yes, then divide the bounding box into N smaller bounding boxes and calculate the intersection again. Repeat this until you find the bounding box where the triangle that intersects with the light is located, and then perform the calculation on this triangle. Final render. #########

The BVH algorithm can greatly reduce the number of triangles that need to be traversed to calculate the nearest intersection point of each ray, and it only needs to be done once to use it for all rays, greatly Improved execution efficiency.

2.DLSS

Is the light chasing speed fast? , it needs another technology to be used together.

That’s NVIDIA Deep Learning Super Sampling (DLSS), a deep learning neural network that boosts frame rates and produces crisp images.

The full name of DLSS is Deep Learning Super Sampling, and the Chinese name is deep learning super sampling technology. It can use a low-resolution image (such as 1080P) to generate a high-resolution image (8K), and then shrink the 8K image back to 4K to obtain a super-sampled anti-aliasing (SSAA) image.

NVIDIA DLSS is the only super-resolution technology driven by AI. This advantage can bring the highest possible resolution to games. Up to 2x performance improvement.

#For example, in the foggy scene of Black Wukong, there was no unstable frame rate, mainly due to DLSS technology.

##DLSS is a new exclusive anti-aliasing technology launched by NVIDIA after TXAA, leveraging the power of deep learning and AI Features to train the GPU to render crisp game images.

The working principle of DLSS is image super-resolution technology, a function of optimizing images based on AI and deep learning. Through NVIDIA’s supercomputing, it continuously passes AI learns ultra-high-resolution game images and continuously restores low-resolution images to complete the details.

Because the supercomputer has huge computing power, it can slowly complete the details, improve the resolution, use deep convolutional neural network training, and finally output various An image with near-perfect detail and extremely high resolution.

The calculation process of DLSS is all completed in the Tensor Core core unit unique to the RTX graphics card, so it does not occupy The CUDA general-purpose computing unit of the graphics card avoids consuming the rendering performance of the graphics card and reducing the number of game frames.

#DLSS technology can be called a milestone in graphics card rendering. Because there is a rule in the graphics field, if you want better image quality, you must need better performance, and DLSS 2.0, a revolutionary technology, breaks this rule and can improve performance without affecting image quality. .

After turning on DLSS, the engine's rendering will run at a low resolution of 1/2 to 1/4 pixels. More than half of the pixel-level calculations are omitted. Pixel-level calculations are very time-consuming and performance-consuming. Generally speaking, 3A masterpieces with better graphics consume more rendering performance, and the more rendering performance becomes a bottleneck, while DLSS will provide greater acceleration.

There is no need to preset ultra-high-definition images in the game. As long as DLSS technology is used, the super-computing pre-calculated model built into the driver is enabled, and you can play The game will call the DLSS function when it is turned on.

What’s really special about DLSS is that it is the first AI algorithm to simultaneously generate stable images, yet Dither artifacts. Every game captures high-quality image sequences, avoiding the high cost of real-time rendering, and games render very quickly.

It is also the only picture scaling technology that can utilize deep learning neural networks to ensure that image quality is comparable to native resolution. Without AI-powered scaling technology, upscaled images can produce unsightly artifacts such as motion artifacts, flickering, and dull, blurry textures.

With the help of DLSS technology, the image quality can be improved first. Through advanced time feedback technology, clearer image details can be achieved while improving stability between frames.

Image captured at 1080p resolution using DLSS "Quality" mode

Secondly, it can increase the frame rate and resolution. The new AI network uses Tensor Cores more efficiently to achieve 2x the speed of the original version, which improves frame rates and removes previous limitations of graphics cards, settings and resolutions.

Currently, DLSS has been updated to version 2.4.0.

#Looking at the 2x improvement in game performance, frame rate and image quality are really nothing to say.

Now, NVIDIA DLSS has been used in 200 games and applications.

Netizens’ hot comments

After watching this video shown by NVIDIA, netizens are worried about their Will the graphics card explode?

What everyone is more concerned about is, when will Black Wukong come?

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