That seemed intuitive to me as well at first, but I wanted to check to be sure. Will Unreal’s occlusion culling mechanism still work on a single mesh, though? Or would it be rendered regardless (assuming there’s a part of it that’s always visible)? Also, could I have multiple Lightmass Importance Volumes over the single mesh, and if so, should I? Or should I just use one big, all-encompassing LIV?