Re: How to add foundations ?
From what you describe, it sounds like you started with a platform rather than a flat foundation. They work a little differently and it is best to build with a foundation, raise it and then put any platforms on top of the foundation if you are going to use platforms in the build.
To start a build, I always use the use the room tool to build a room. Then click on the room and there will be a double-sided arrow in the middle of the room pointing up and down. Drag the arrow up and you get a foundation.
Hope this helps.
