I thought about merging the buildings as well but there is plans for destruction so I guess it wouldn’t really work when your up close. But once you step away, switching them to merged version is what I thought would happen with the HLOD. Trying regular LOD for the modular pieces leads to noticable gaps between pieces . Once the HLOD mesh is created I tried LOD those and it worked great but still had higher draw calls and more triangles than the original modular ones.