What is what does pbr means?

PBR stands for "Physical Based Rendering". It is a technique used in computer graphics to create realistic lighting and shading effects in 3D models. PBR is based on the physics of how light behaves in the real world, allowing for accurate simulations of materials and their interactions with light sources. PBR has become a standard approach in the game industry, enabling high-quality graphics and immersive experiences in video games.