I have several layer of multipatch polygon (7 layers: 46 MO total. See attachment) and when i try to connect to them into CAD even a 8 MO layer can't be manage properly. It is awfully long to load and nearly impossible to update the view. I tried transformingthe multipatch into .dwg but the same inefficiency happened. I'm i doing something wrong? is there another file format who would be easier to manage in AutoCad?? I don't think its a size issue more than a format issue????