FAQ: I attached a coordination model in my AutoCAD drawing. Why does it look like a box instead of my model?

Attaching a coordination model is supported only on 64-bit systems. If you are working on a 32-bit system, the coordination model appears as a box.
To view an attached coordination model, hardware acceleration must be on.
To view an attached coordination model, the per-pixel lighting option for hardware acceleration must be on.

NOTE:Use the GRAPHICSCONFIG command to access hardware acceleration settings in the Graphics Performance dialog box.