Cellar / chassis is not visible

[AlbertVonMoosseedorf]

I am designing a motorhome and added recently the chassis to the design because I have to place some components into the chassis. I think this is similar to a cellar. I added a new level with negative rising as described in the manual. That works so far, the level is on the first place, I can place objects in this level, the level is marked visible, but there is nothing to see in the 3d view.

Whats wrong [:-/]

[UbuntuBirdy]

Because the objects are under the surface. Try to rise all the levels the same value until your first level is at altitude 0.

[AlbertVonMoosseedorf]

Thanks for an answer that works.

But why is it then described and possible that there are levels beneath the surface that are not visible ? That doesn't make sense to me.

[UbuntuBirdy]

If you build a house, the cellar is not visible from the outside because it is under the surface. If you create walls and rooms and switch to visitor mode, you can walk through your cellar and you can see everything thats placed inside.