Learn how Substrate, Unreal Engine 5’s unified physical shading framework, replaces legacy material modes with composable BSDF nodes. In this tutorial you will enable Substrate in your project, build a Slab BSDF material from scratch, and connect a full PBR texture set including Albedo, Roughness, Metalness, AO, Normal, and Height maps. You will also learn how F0 drives specular reflectance, how to derive it correctly from a Metalness map, and how to enable Nanite tessellation so your Height map produces real surface displacement. The session closes with a practical look at Material Instances for asset variation. Prerequisites: basic familiarity with the UE5 interface and an understanding of standard PBR texture maps.
https://dev.epicgames.com/community/learning/tutorials/XE8Y/unreal-engine-intro-to-substrate