<r><QUOTE><s>[quote]</s>Did you give the level an elevation >0? I think you need a level with an elevation where the floor thickness is the resulting thickness of the exported room.<e>[/quote]</e></QUOTE>

Yes, it turns out that non-ground-floors go well. The floor of the rooms are converted into ...

Is there a way to make the bottom of a room/floor solid so that it becomes a solid (thin) shape when exported to .obj and to a 3D printing program? As it is now, the bottom/floor of a house is not printed at all when exported.

The flat ceiling generated by the Roof generator plugin is actually a room; just delete this room and you will be able to see the sloped roof faces from below.

Indeed! This is the best solution for my problem. Thanks for the tips!
[:)]

<t>Hi Daniels118,<br/>
<br/>
Yes you are right, I should have used the word "ceiling", not "roof" although I do indeed need a roof as well. I do have a Roof plugin but as far as I have seen, it does give a nice sloping roof but it does not give me a sloping ceiling.<br/>
I will check out the two ...

<t>Is it possible to make a wall invissible?<br/>
I am trying to make an attic wich has four tilted roof sides. I can create four rooms with a tilted roof but this requires a lot of inner walls. What I would like is to keep the walls controlling the roof tilt but without the walls being visible ...