Substrate is a powerful tool for physically based rendering (PBR). We’ll focus on the Substrate Slab BSDF, which helps create complex materials by allowing multiple layers to interact with light. This tutorial is beginner-friendly, and in the next video, we’ll explore advanced substrate techniques, building on what you learn here. If you’re new to Substrate, stick around!
https://dev.epicgames.com/community/learning/tutorials/Y4en/unreal-engine-substrate-materials-the-beginner-s-guide-part-1