I built unreal from source, but didn’t see anything in debug output during import. I figured I’d load a multi-object file, and that kicked off a little bit… But stopped at 8 percent and a specific mesh in the file. For now I’ll just forward over the demonstration in Unity to our client… But I want to figure it all out anyway. Unity has 65k verts per mesh limit too… But it actually splits the imported file into pieces with maximum of 65k verts - shouldn’t UE do the same?