Best way to fill in the holes?

 From:  BurrMan
2347.16 In reply to 2347.13 
If I make a cube in MoI and import it into Carrara, I apply a shader to the cube. It doesnt allow me to apply a different shader or material to six different sides. If I make the cube. cut a hole, and insert another object to use as a window, when in Carrara I can apply the different shaders to each object.

Maybe it does, but I am not a renderer so I was asking to clear up how he did that with one solid. :)