Guide
PBR texture basics
Understand base color, height, normal, roughness, and ambient occlusion as one material contract.
Core idea
A good material page explains the surface model first, then shows how controls affect exportable maps.
Map relationship
Every channel should describe the same surface so color, height, normal, roughness, and AO agree.
Export judgment
Before export, test tiling, scale, normal strength, roughness range, and final target requirements.