Creating floor plans with SweetHome3D how do I create an attic?

Hello everyone, I am planning my floor plan with SweetHome 3D and I'm having some trouble in the attic. Do I really have to set each wall individually in its slope? Or is there a trick? I found the roof, but with me every wall sticks out of the roof at the top. Thank you very much if someone can help me here.

I am planning my floor plan with SweetHome 3D and there are some issues in the attic. Do I really have to set each wall individually to its slope? Or is there a trick? I found the roof, but for me every wall protrudes out of the roof at the top.

That certainly looks strange, "but you just ignore it." Unfortunately, I cannot give you tips regarding the operation of SH3D. However, I can advise you on walls in the attic in general, or on floor plan planning—namely, planning "from top to bottom," because due to the more intricate structure of the upper and attic floors, problems arise in places other than just drawing if you start with the ground floor. Using lightweight walls as much as possible relieves this significantly (which applies to upper floors as well as attics).

I had given up on that back then and simply drew lines that marked the respective clear room heights along the slope. So 2m, 1.5m, 1.0m up to the knee wall. So purely to be used as a 2D floor plan top view.

Yes, I have only used it for now to make the floor plan, but an exterior view is only possible if I hide the upper floor, otherwise everything overlaps.

but an exterior view only works if I hide the top floor, otherwise everything overlaps

And your imagination can't hide the walls penetrating the roof?

You can change the height of an entire wall under the roof. Experiment a little.. You can also create slanted walls… Enter start and end height. Sometimes you also have to split and edit a wall. You can select several walls if necessary and enter uniform values. SH3D can do all that.. By double-clicking on a piece of furniture or a wall, you always enter the edit menu… at the beginning, you have to experiment a lot.. or watch a video about it..