In this tutorial we explore using Unreal Engine’s baking toolset to enhance static meshes created with the modeling toolkit and blueprint cloning. We will explore using the modeling toolkit to create a cutout which we will then use blueprints to clone bricks around and finally merge and create an ambient occlusion map to add darkness as a foundation for dirt and grime.
https://dev.epicgames.com/community/learning/tutorials/ODW8/fab-unreal-engine-5-7-using-ambient-occlusion-for-grim-and-dirt