# What is PBR (physically based rendering)?

Source: https://cloudbrain.in/glossary/physically-based-rendering
Last updated: 2026-11-10

PBR (physically based rendering) is an approach to materials and lighting in 3D graphics that models how real surfaces reflect light, so materials look consistent under any lighting. PBR materials let one material library look right in real-time viewports and final renders alike.

## Why does PBR (physically based rendering) matter for architects, engineers and contractors in India?

PBR materials let one material library look right in real-time viewports and final renders alike. It speeds up visualisation because materials need less manual tweaking per scene.

## What is an example of PBR (physically based rendering)?

A polished granite floor uses PBR roughness and reflectance values, so it looks correct both in the live viewport and the final render.

## Where does CloudBrain come in?

Our [AI visualisation](/services/ai-visualisation) service helps architecture, engineering and construction firms put this into practice. See the related terms below, or browse the full [AEC × AI glossary](/glossary).