Thanks okh.

On these links I found how to achieve the effect I want.

[font=times new roman]Good afternoon

I have a two levels design, when I have active the second level in the 3D view also sees the first level.

I can put the floor/ceiling opaque to prevent this happening?

Thanks in advance[/font]

[font=times new roman]I have a design with a curved wall, which I want to put a window that has the same curved shape, but I could not do it. Could someone guide me how.

Thanks in advanced[/font]