Well, that might work but that would definitely make the 3D view ugly. Transitions between levels would not show since I could no longer have steps between the levels. And one of the big advantages of the 3D view is the ability to walk through the house and see the lines of sight accurately. Doing everything on one level we would lose that.
I guess I could keep 2 versions of the drawings. The multi-layerd one for my use and then copy and paste into a second file where everything is on one level. This seems error prone since I'd have to remember to update the 2D file every time a change was made to the multi-layered version.
As I understand it, SweetHome it is already calculating what to show on a particular level based the highest elevation of a particular item in a level. For example, I have tall trees in my lower garden level which show up in a level whose elevation is many feet above the elevation of the the tree's level. Since this calculation is already being done in SweetHome I thought it might be a relatively simple fix to alter that logic based on a user-defined option. (I say this as one who has significant experience with Java I realize that what appears to be simple may in fact be very difficult
!)