Physically based rendering (PBR) is a way of creating realistic images in computer graphics. It works by simulating the way light interacts with objects in the real world. This includes things like how light is reflected, refracted, and absorbed by different materials.

PBR is different from traditional rendering techniques in that it doesn't rely on pre-made textures or shaders. Instead, it uses mathematical equations to calculate the way light interacts with each object in the scene. This allows for more realistic and detailed images, as well as greater control over the look of the scene.

PBR is becoming increasingly popular in the video game and film industries. It's also being used in other areas, such as architectural visualization and product design.

Here are some of the benefits of using PBR:

More realistic images: PBR simulates the way light interacts with objects in the real world, which results in more realistic images.
Greater control over the look of the scene: PBR allows artists to have more control over the look of the scene by adjusting the properties of the materials.
Increased flexibility: PBR is more flexible than traditional rendering techniques, as it doesn't rely on pre-made textures or shaders.
Improved performance: PBR can be implemented in real-time, making it suitable for use in video games and other applications where performance is important.
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