About the Scene Occulusion Issue

Hello everyone, I have a project that I focus on continuing and I am trying to share every stage of it as a show case. At the same time, some problems arise and I am waiting for your help.

For example, in the 3D model below, I want to create an occulusion where the boards meet. You know. The boards are made of separate meshes and there are actually recesses between them towards the inside.

Medieval Collection - Community / Showcase - Epic Developer Community Forums (unrealengine.com)

But I can’t show it. Help would be really appreciated. Thank you.