How to create a split level house?

[omni]

What you need is something that the roof divideds the walls as exterior and interior. We need something that will allow us to divide walls instead of horizontal and vertical but on angles.

I thing I may have found it. In HDP 9 When you click the wall and bring up the wall specs click on the roof tab and in the lower right there is a drop down box that you can specify the lower wall below the roof the wall above the roof line will be the default wall.

I don't know if hdp 8 has this.