This tutorial is intended for beginners and teaches how to create a simple master material that uses Red Green and Blue Channels of a texture as masks to create a wider range of materials using less textures and overall less work.
Viewers should have a basic understanding of Unreal Engine 5 UI, as well as basic understanding of using image editing software to edit red green and blue channels of an image.
https://dev.epicgames.com/community/learning/tutorials/7OvD/unreal-engine-ue5-masked-master-material-beginner-tutorial