I made a PCB in PADS9.2. When I tried to view in 3d, none of the compoents are visible. Finally I was told by somebody, the component outline shoud be at Layer25. I made the outline at Layer25, and was able to see the components in 3d. But I have some components mounted on the bottom layer of the PCB. They were not visible in 3d view. So I assume their outline also should be in some other layer. I tried to put them in Layer25 and nothing happened. Can you please inform me in which Layer I need to put their componets outline.